Diseases of hibiscus holes in the leaves. How to care for indoor hibiscus. Spider mite damage

Hibiscus, otherwise known as Chinese rose, is a popular ornamental plant with beautiful bright flowers. At the moment, many varieties have been bred that take root well at home and grow well. Hibiscus, indoor care at home which is carried out in accordance with all the rules, will delight the owners of the house with its flowering for a long time. So, what should be the care of indoor hibiscus at home?

Who first decided to call the Chinese rose that way is not known for certain. Since ancient times, there have been various signs relating to plants. Some superstitions promise good luck, others are not so optimistic. So why is hibiscus called the flower of death? However, this is not the only plant that has fallen into such an unfortunate list, except for the Chinese rose, ivy, calla are considered deadly, and according to popular beliefs, all these plants bring death to the house.

Hibiscus has different meanings. If the plant suddenly blooms, this is a sign of the imminent death of one of the household members. Dropping leaves promises serious illness and trouble. Probably, once such coincidences really happened, because of which the flower gained notoriety. However, in Soviet and current years, this is a very popular plant in city apartments, behind which no ominous manifestations have been noticed.
Can you keep hibiscus at home? Absolutely yes. Flowers, leaves and fruits of hibiscus are not poisonous, which means that superstitions have no convincing basis.

Optimal temperature

How to care for hibiscus? The Chinese rose loves warmth, so for its comfortable existence it is necessary to maintain a temperature not lower than 18 and not higher than 22 degrees Celsius. However, hibiscus blooms in a cool period at + 15º C. Therefore, after the summer months, it is better to take the flower to a cooler place without bright sunlight. In summer, a pot with a plant can be kept on a veranda in the garden or on the balcony of a city apartment. Chinese rose loves fresh air, but it should be protected from drafts.

What lighting to choose

Hibiscus loves not only warmth, but also the bright sun. For this reason, it should be kept in the southern rooms. If it is too hot, the plant should be removed from the windowsill away from the glass or covered to protect it from the sun. Alternatively, flowers can be placed on a table by the window, where there is enough light, but the sun's rays are no longer so aggressive and will not damage the delicate hibiscus petals.

The lack of light is one of the reasons why hibiscus leaves turn yellow and fall off, and in some cases buds. What to do in such a situation? It is enough to provide the plant with access to good lighting.

How to water

Hibiscus requires timely watering, apart from constant spraying. Without enough moisture, it can dry out. You need to water the flower with water only at room temperature; before watering, the water should settle in a glass container with a wide neck. If the apartment is too hot, moisture will quickly evaporate from the ground. To prevent this from happening, you need to use devices to reduce evaporation or cover the ground with ordinary moss.

In order for the leaves to be green and healthy, they need to be sprayed regularly and the air in the room must be kept sufficiently humid. To do this, you can use humidifiers or simply put water containers on the batteries. When spraying the leaves, you can not touch the flowers, they must remain dry. Periodically, the plant needs to be washed in the bathroom, washing away dust and dirt from the leaves. To prevent water from leaking into the pot, cover it with a plastic bag.

If the leaves turn black, this is a sign of excess water. To save the plant, it must be taken out of the pot along with an earthen clod and put to dry for 12 hours. Then it is worth cutting off the rotten roots and transplanting the flower into fresh soil.

Difficulties in Growing Hibiscus

Hibiscus is a fairly unpretentious plant, so even if you make a mistake somewhere when leaving, it can be quickly corrected. Those who have only recently acquired a Chinese rose often wonder why the leaves of the hibiscus turn yellow, begin to dry out or fall off. This problem is easily corrected by spraying more frequently once you notice that the leaves have become limp. In addition, the plant itself sheds leaves after flowering - this is completely normal.

If the flower is withered, this may be a sign of too cold ground. From hypothermia, the leaves may also turn black. The plant must be returned to a warm place and do not forget about abundant watering. If everything is done in time, hibiscus can still be reanimated.

Why do hibiscus leaves turn yellow and fall off? Such a problem may indicate poorly filtered water. If the leaves are not only yellow, but also with brown edges, this means that there is little nitrogen in the ground. When temperatures and humidity fluctuate dramatically, a stressed plant sheds both leaves and buds. However, then it is restored and grows new leaves.

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Pests and diseases

Hibiscus Chinese, like any other indoor plant, is faced with various diseases and pests. If the care of hibiscus at home is timely, it helps to avoid trouble. However, even with good care, mites, aphids or some diseases can appear, which can be a headache for beginner growers.

Spider mites

All dry flowers and leaves must be removed in time. If preventive measures were unsuccessful, in order to get rid of the tick, more frequent watering and spraying is needed. In this case, the pot of the plant must be completely covered with polyethylene so that the moisture does not evaporate. Spider mites die in too humid conditions.

Aphid

In a small amount, aphids are not dangerous, but if there is too much of it, the leaves will begin to turn yellow, curl up into a tube and fall off sooner or later. The plant itself will be sluggish in appearance and stop blooming. If there are too many aphids, sticky secretions of these insects will be visible on the leaves.
While there are few aphids, the leaves can simply be washed with soapy water. If the insects have already settled down on the Chinese rose, only spraying with special means will help here. After using chemicals, the plant will need more thorough care until it is fully restored.

leaf chlorosis

This disease is typical for hibiscus. Chlorosis occurs due to improper care of the flower. Signs of the disease:

change in the shape of the leaves;
the appearance of brown spots;
dry petals;
buds do not bloom and fall off.

Chlorosis indicates deficiencies in useful trace elements - manganese, potassium, zinc, etc. The plant can be saved by transplanting it into fresh and well-fertilized soil. In addition, daily spraying is necessary. If the disease has begun recently, it is enough just to fertilize the soil.

Indoor hibiscus is not capricious in care, and therefore both experienced growers and beginners can grow beautiful flowers. Large bright flowers will decorate the room and will please the eye for a long time. Such a flower can become not only an interior decoration, but also a good gift for relatives or friends.

Hibiscus is a popular plant that can give its owner cause for concern. For example, when the tips of the leaves dry on a plant, and it gradually fades. This can happen if your hibiscus variegated is attacked by diseases and pests. In this article we will tell you why hibiscus leaves curl, what to do and how to treat a flower at home.

One of the reasons why the leaves of a houseplant begin to curl is pests. For example, a flower affected by a whitefly (whiteflies are one of the most dangerous pests) has yellow leaves covered with sticky drops all over their surface. In addition to the whitefly, other hibiscus pests threaten the plant: aphids, gall midges and spider mites.

Aphids are another misfortune familiar to people who are fond of floriculture. Aphids are usually attracted to the fleshy shoots of the plant, so they attack it quickly and drink juices from it. One of the characteristic signs of the appearance of this pest is that the plant twists the leaves, and subsequently sticky droplets quickly appear on the leaves.

To combat aphids, the following methods are used: first they should be removed from the leaf and stem with a cotton pad, and then treated with soapy water or special preparations (Aktara, Iskra).

Gallica

Another reason why the leaf plate twists and falls off is the gall midge, which poses a threat to both the leaves and the root system of the plant. Usually, pest eggs can be found in the buds of a plant - it is there that worms hatch from the eggs, gnaw on the buds, and then fall into the soil, closer to the roots of the plant.

Diseases and their causes

In addition to the invasion of insects, your flowers can also be subject to diseases. Hibiscus diseases, if left to chance, can cause the death of the plant. Rotten roots, leaves starting to dry out are all clear signs that the hibiscus needs help. We are not talking about various types of rot when the plant is rotten or its roots have dried up, but about diseases that affect the condition of the foliage of the flower. So, let's look at the main leaf diseases and their treatment.

Chlorosis

Chlorosis is nothing more than the loss of leaves of their color. The leaves affected by the disease rapidly lose color and become very pale, even slightly yellowish. The disease is most dangerous because the leaves may not only lose their color, but over time they may begin to fall off. Thus, if you do not take any measures, soon your hibiscus may remain completely naked.

sunburn

Another misfortune that poses a significant danger, but in essence is not a disease, is sunburn. Everything is simple here: sunburn occurs as a result of violation of conditions of detention. Hibiscus, like the vast majority of plants, does not tolerate direct sunlight. Therefore, if you forget about it and place him in a place where he will be under their direct influence, be prepared to accept the consequences in the form of a sunburn.

Also, this misfortune can appear if you kept your plant in the shade for a long time, and then abruptly put it in a bright place. In this case, it is not even necessary that direct sunlight falls on it - a simple change of scenery will be enough. In addition, sunburn can occur even if the leaf seems to stick to the glass.

Sunburn looks like a small reddish or yellowish dry spot on the surface of the leaf plate. Measures to save the hibiscus are best taken immediately, because the longer you delay, the more rehabilitation the flower will then need.

Treatment and prevention

In order to fix the problems, you will need to cure the plant, saving it either from the invasion of insects or from diseases. If in the case of insects it will be enough to use any effective insecticide or acaricide (and for those who like to use folk remedies - a soapy solution), then with diseases you need to act a little differently.

With chlorosis, it is necessary to treat the hibiscus with iron chelate and apply the necessary fertilizers (since the disease itself is often due to a lack of nutrients). In addition to improving the conditions of detention, you will not help the plant in any way.

In order to eliminate the effects of a sunburn, you need to remove all damaged hibiscus leaves, as well as optimize the conditions of detention - for example, put in a darker place.

To keep your hibiscus leaves safe and sound, follow these simple guidelines:

In this video, an expert will talk about how to save indoor plants from pests and diseases.

Chinese rose, otherwise called hibiscus, is one of the best ornamental plants that can be grown indoors. Hibiscus flowers with tubular stamens delight almost everyone who has the opportunity to admire them. Learn all about caring for the Chinese rose so that growing the plant is simple and brings the desired results. Read also what diseases and pests can threaten the Chinese rose, and how to avoid possible problems when growing hibiscus at home!

Brief description of hibiscus

Chinese rose (Hibiscus rosa-sinensis), also called hibiscus or kenaf, belongs to the Malvaceae family (it includes all possible types of mallow). The home-grown Chinese rose should not be confused with its garden sister, the Syrian hibiscus, which is simply called hibiscus or garden hibiscus (Hibiscus syriacus).

Chinese rose can be considered an ideal houseplant. Although its extraordinarily large flowers bloom for only one or two days, with the right growing conditions, you can enjoy continuous flowering (flowers open every day) from May to October. The flowers are usually very large in size and with a variety of colors, depending on the variety, they are purple, white or red, one-color or spotted, with interesting stamens collected in a tube.

Chinese rose, hibiscus - care, cultivation

Location for growing hibiscus. Chinese rose prefers sunny places, but the light should be diffused. The ideal location for this plant would be from the south (but not on the windowsill or right next to the window, but rather somewhere at a distance of about 1 meter from it), the west or southwest side (here it can also be placed on the windowsill). In summer, hibiscus can be taken outside, for example, on a terrace, but this should be a slightly shaded place (partial shade). Never forget that on very hot days the plant should be protected from direct sunlight. With an excess of light, hibiscus leaves begin to turn pale, and in a too shaded place, the plant blooms weakly.

Temperature for growing hibiscus. The plant prefers to be warm. In summer, it feels best at a temperature of about 20℃, the highest indoor temperature that is allowed is 27℃. In winter, from November to January, hibiscus should be moved to a cooler room with a temperature of 15-18℃. At this time, the Chinese rose is at rest. Along with a decrease in temperature, the plant also needs to limit watering and stop feeding.

Humidity when growing hibiscus. To grow a Chinese rose, it is necessary to provide it with conditions with a sufficiently high humidity; for this, the plant can be irrigated from a sprayer (it is better to do this with settled water). However, always remember that leaves that are under the sun should not be exposed to water, because this can lead to sunburn.

Watering hibiscus. Caring for home-grown Chinese rose requires proper watering of this plant. From spring to summer, watering hibiscus should be plentiful enough. Keep the soil constantly moist, but not wet. In the period from November, along with a decrease in temperature, watering is also limited to the plant (it is carried out no more than once every two weeks).

Top dressing of the Chinese rose. When growing hibiscus at home, it is very important to carry out timely feeding. Without this procedure, the plant will not be able to produce a large number of flowers. Feeding hibiscus should begin in the spring as soon as the first flower buds appear and continue to fertilize throughout the flowering period. Top dressing is carried out every week, using multi-component fertilizers for flowering plants, which can be dissolved in water for irrigation. Dose fertilizer should be in accordance with the instructions described on the package. In autumn, top dressing is limited, and in the period from November to January, when the plant is at rest, it is completely abandoned.

Hibiscus transplant. Chinese rose, grown at home, should be replanted annually, in the spring. Usually, land intended for planting indoor plants, which can be purchased at any flower shop, is ideal for a plant. The ideal soil for hibiscus will be clay soil mixed with peat and sand, with a pH of 5.7 - 6.8.

Pruning Chinese rose. To form the correct shape of the bush and ensure lush flowering, the Chinese rose needs systematic pruning. This procedure should be carried out in late winter, when the plant is still sleeping. Also, pruning can be done during transplantation. Stems should be shortened to half their original length.

Reproduction of hibiscus. Reproduction of the Chinese rose at home is best done in the spring, rooting lignified cuttings cut from the apical shoots, on which 2-3 leaves are preserved. Before planting, the cuttings are dipped in a tool that accelerates the development of the root system, and then they are transferred to light peat soil (for example, a mixture of peat and sand). The cuttings are provided with high temperature conditions around 25℃. Within three weeks they should be fully rooted.

Chinese rose, hibiscus - diseases, pests

Improper growing conditions can often cause hibiscus diseases or pests.

Too wet soil can lead to rot the root system and leaf fall Chinese rose. Drying out of the soil, too dry or too humid air, can lead to the fall of flower buds. If the edges of the leaves curl up, the soil in the pot may be too dry. The edges of the flower petals turn brown and then black if you spray the plant in high heat in the sun or in very cold water.

White or red spots on flowers or young shoots of hibiscus indicate that the plant was attacked gray rot. In this case, completely refuse to spray the plant and treat with Biosept 33 (at a concentration of 0.1%), Rovral Flo 255 (at a concentration of 0.2%) or Teldor 500 (0.1%). Repeat spraying after some time.

If hibiscus leaves appear brown-purple spots, and then the leaves begin to freeze, this indicates alternariosis. To combat it, you can use the drugs "Rovral Flo 255", "Garant 500" or "Folpan 80" (at a concentration of 0.2%).

Too dry air promotes hibiscus pests such as aphids, mealybugs and spider mites.

Recognize Presence spider mite on the Chinese rose, it is possible by the presence of yellow spots on the leaves and cobwebs on the bottom of the sheets. In this case, you should use the drug "Karate Zeon 050" at a concentration of 0.05% (5 ml per 10 liters of water). The second method of dealing with spider mites includes the use of an insecticide in the form of Provado or Clean Sheet sticks. These funds do not act immediately, so you will have to wait a bit before you get the desired result (the substances contained in the sticks enter the ground, and from there to the roots of the plant and its tissues, from where they are sucked out by pests). This may take approximately several weeks.

About what appeared on hibiscus mealybugs You will recognize it by the white fluff that accumulates at the base of the leaf petioles. You can fight them using the same insecticides as when the spider mite appeared, Provado and Clean Sheet.

Aphid immediately forms colonies with offspring, most often planting their babies on young leaves, stems, flower buds and on the flowers themselves. Where the aphids have stuck, the leaves begin to discolor and deform, often covered with sticky secretions of aphids - honeydew. To eliminate aphids from a plant, you can use any preparation that is intended for this.

Remember that when spraying with any of the above drugs (other than those on a natural basis) to eliminate diseases and pests, the plant must be taken outside, because the drugs can be harmful to people. They must not be used indoors.

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The main diseases of hibiscus

The plant is quite unpretentious, so even serious oversights, if they occur in a single amount, cannot cause significant harm to it. But a systematic violation of the conditions of agricultural technology will definitely provoke troubles, the plant will begin to wither, feel bad, get sick. All known hibiscus diseases can occur due to such phenomena:

Stay in a hot, dry area.
Lack of spraying, especially in the summer.
Being under the wind, draft, under direct sunlight.
Dustiness, contamination of hibiscus.
Excessive watering, which led to rotting of the roots.
Watering a Chinese rose with bad water (not settled, containing a lot of harmful impurities).
Infection by pests as a result of contact with diseased plants.
No transplants, fertilizing with fertilizers.
"Overfeeding" hibiscus with nutritious fertilizers.
Poor lighting, or a flip of the flower on the other side to the sun.

If the living conditions of the Chinese rose are favorable, then it grows for a very long time, and blooms from March to October and even longer. But the violations described above, subject to their regular influence, can provoke various diseases. Below are the most common ones.

Name of the disease	Cause	Description of features
Non-infectious chlorosis	Malnutrition of a plant is a lack of nitrogen, iron, potassium, magnesium, or starvation of one of these elements due to an excess of another.	Thinning branches, weak color of flowers, lack of flowering (potassium deficiency), leaf spot (deficiency of magnesium, nitrogen), abscission, yellowing of leaves (iron deficiency)
infectious chlorosis	Infection of hibiscus with viruses, fungi, microbes and pests	Falling off, yellowing of leaves, lack of flowering, general weakness of the plant
Sunburn	Hitting the flower in direct sunlight, an unexpected change in lighting	The appearance of white burn spots on the leaves of the plant
Vascular (tracheomycosis) wilt	Infection of a Chinese rose with mushrooms of the genus Verticillium or Fusarium, the development of Fusarium or Verticillium diseases, as well as infection with certain types of viruses	Drying, wrinkling of branches from the ends, rapid transition of the process to the trunk, death of the plant

leaf diseases

Separately, I would like to dwell on the problems and symptoms that arise when there are violations of the vital activity and development of the flower. Leaf diseases in most cases are provoked by chlorosis - a decrease in the production of chlorophyll in the green part of the plant. Below are the main symptoms of trouble in the hibiscus state, as well as their possible causes:

Yellowing of the leaves - pest infestation, plant root diseases, leaf chlorosis, poor indoor air humidification.
Falling hibiscus leaves - low humidity, lack of spraying, a sharp change in lighting, drafts, other types of stress for the flower.
Yellowing, coupled with falling leaves - waterlogging of the root system in winter, stress, low humidity in the room.
Twisting the leaves into tubules is the defeat of aphids or some other pests.
Withering of the tips of the leaves - lack of nitrogen, phosphorus, other nutrients, the complete absence of complementary foods for hibiscus.
The general wilting of the leaves and the entire flower is the excess of the temperature in the room above the norm, the decrease in humidity to low levels.
Dropping leaves and buds by a plant - lack of the required amount of potassium in the soil, damage to the leaves by midges, high temperature in the room.

Treatment of diseases

Most of the problems of the plant are solved by normalizing its content. To do this, it is important to ensure the following conditions:

Do not water the flower too often, but do not forget to do it regularly, without drying out the earthy coma
Remove the flower from the direct rays of the sun, put it in partial shade
Fertilize hibiscus once a week until about mid-August, then once a month
The number of waterings in autumn and winter should be reduced, and the plant itself should be placed at a temperature of up to 15 degrees.
Spraying a flower should be daily, regardless of the time of year
Provide good drainage, transplant Chinese rose

Treatment of hibiscus diseases is carried out depending on the problems. To avoid sunburn, those plants that are grown in greenhouses must be taken out in the sun for an hour and a half a day, and only then begin to leave them for a longer period. Leaves that have already become covered with burn spots will fall off, and new ones will grow to replace them.

Against non-infectious chlorosis, regular feeding of the plant with fertilizers, which can be found in any gardening store, is excellent. Before watering, water with iron deficiency should be flavored with iron chelate. Timely transplanting, avoiding contact with diseased plants, cleaning from dirt and dust, and fertilizing will help prevent infectious chlorosis. Periodically, the flower should be washed in the shower, covering the ground with cellophane. Temporary quarantine is mandatory for all new plants.

It is very difficult to treat vascular wilt of hibiscus, it is not always possible to cure it. Many plants die quickly, sometimes they do not even have time to fall off the leaves. You can try to get rid of the problem in the following ways:

Cut off all dry areas, grabbing a little healthy parts of the flower
Treat the entire plant with special antifungal drugs (Dezavid, Zircon, Thunder-2, Domotsvet, Cytovit, Epin, Alirin-B, etc.)
Sprinkle a Chinese rose with a solution of Trichopolum (2 tablets per liter of water) - a folk method

Pests

Plant pests settle on it after contact with diseased flowers, or when transplanted into infected soil. Most often placed on the Chinese rose such pests:

Aphid. A small insect that settles on buds, young shoots. It multiplies rapidly, creates colonies, destroying young leaves and unopened flowers, which initially become sticky.
spider mite(red pouch). Invisible without a magnifying glass, lives at the bottom of the sheet, enveloping it with a shell that looks like a cobweb. It breeds best in warm, dry air.
Greenhouse whitefly. Causes yellowing of the leaves, covering them with sticky secretions. The insects themselves or their yellow larvae can be seen from the bottom of the leaf.
Worms. They manifest themselves as waxy white secretions on the cuttings, in the axils of the leaves.
Shields, false shields. After their colonization, brown tubercles are observed on the stems.
Gallica. This midge causes fall, yellowing of leaves and buds that do not have time to bloom. Inside the buds, you can find small midge eggs, from which worms appear. They eat the buds from the inside, which together with them fall to the ground.

What to process

The question of how to treat hibiscus for diseases, in the presence of pests, is very relevant. If the prevention of diseases caused by pests turned out to be ineffective, then the following treatment methods are carried out:

From aphids - flower treatment with Anabasin, Nicotine sulfate. It is recommended to change the drug more often - to Decis, Fitoverm, Intra-vir, Tobacco dust. With a single defeat of the leaves of aphids, treatment with a soapy solution helps well.
From scale insects - spraying with a solution of Actellik or other insecticides.
From the worm - the treatment of leaves with mineral oil, which is done only when the plant is in the shade.
From the whitefly - treatment with drugs Aktara, Karbofos, Iskra, Tanrek, Biotlin, Bison, applying potassium soap.
From spider mites - washing the plant with soapy water, treatment with Lightning, Vertimek, Akarin, Fitoverm.
From gall midge - collection of affected buds, preventing them from falling to the ground. The soil itself must be treated with any medicine for soil pests.

Of the folk remedies that can be used to combat plant pests, the following are popular:

Pour dry red pepper with water (1: 2), boil for an hour, strain. 10 gr. dilute the resulting solution in a liter of soapy water, treat the plant. This method helps well against ticks, aphids
Boil dry mustard (50 gr.) in a liter of water for 15 minutes, let cool. Dilute the product in 20 liters of water, wash the leaves of the flower from aphids, scale insects

If all the conditions for growing a plant are observed, then it is unlikely to have problems in the form of diseases and pest infestation. A healthy hibiscus will bloom for a long time and delight its owner.

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Chinese rose - diseases, pests and ways to deal with them + Video

Chinese rose, also known as hibiscus, is quite unpretentious, but it also has its enemies in the form of various pests and diseases that annoy it. Knowing about the causes of damage to any ailments, you can completely prevent the disease of this plant. And if such an attack has befallen a Chinese rose, then you need to know about how to deal with it.

What provokes diseases of the Chinese rose?

The main symptoms of deterioration or disease of hibiscus

All about hibiscus diseases - types, symptoms and causes

Treatment of diseases and the fight against the consequences of some mistakes in care

What to do if the plant is stressed?

The most common pests and their control

Most of the diseases of the Chinese rose are associated with improper care for it. And in second place in terms of the number of diseases and the frequency of their manifestation are cases of infection with fungi and pathogenic viruses. But, by the way, the defeat of a rose by most of these ailments also depends on the correctness of its cultivation. After all, when the plant does not receive proper care, it becomes weakened and, as a result, more susceptible to infection by fungi and viruses.

Chinese rose

Hibiscus is resistant to the vicissitudes of fate - it is not very dependent on how it is grown. It means that even serious flaws in caring for it cannot cause significant harm to the Chinese rose. However, this plant "forgives" such negligence only if they are allowed in a single amount. A systematic violation of any requirements of agricultural technology will certainly provoke certain troubles and diseases. Hibiscus will begin to feel bad at first (weaken), and then it will wither and get sick.

So, all currently known diseases of the Chinese rose can affect it due to the following care errors:

placing the plant in a draft, under the wind or direct sunlight;
excessive watering, resulting in rotting of the roots;
placement in a dry or hot room;
contamination and dustiness of the plant, especially its leaves;
lack of spraying or when they are extremely rare, especially in summer;
watering with poor quality water (containing a lot of impurities harmful to room roses or not settled);
poor lighting, and sometimes the turn of the flower with the back to the sun;
"overfeeding" with fertilizers;
lack of fertilizing with fertilizers and transplants;
allowing contact with already diseased plants, as a result of which the hibiscus is affected by diseases and pests.

All these violations in care, subject to their systematic impact on the Chinese rose, provoke various diseases in it. If this plant is provided with favorable conditions, or at least not injured by its careless attitude, then it grows for quite a long time and always pleases with its flowering every year from April to October, or even longer.

2 Main symptoms of deterioration or disease of hibiscus

In most cases, the first signs of deterioration in health or disease of the Chinese rose are any changes in the condition of its leaves, as well as some of the other symptoms listed below. In each individual case, the plant may become unhealthy, usually for one of several reasons. The following are the main symptoms and the most likely causes that caused their appearance.

yellowed hibiscus leaves

If the hibiscus has leaves:

Turned yellow - the plant is infected with pests (spider mites or aphids), its roots turn white, leaf chlorosis, or insufficiently humid air in the room.

Turned yellow and fall off - stress (occurs when adverse factors occur or a sharp change in conditions of detention), drafts or insufficiently humid air in the room, and in winter also from waterlogging of the roots.

Fall off - insufficiently humid air in the room, stress, a sharp change in the intensity of lighting or drafts.

Wither at the tips - the plant lacks phosphorus and nitrogen, and also, most likely, some other nutrients.

Twisted into a tube - pest damage, most likely aphids.

They fall along with the flower buds - it is too hot in the room, the plant lacks potassium, or it is affected by a pest (midge gall midge).

Wither along with the whole plant - the room is too hot or the humidity is below critical levels for the Chinese rose.

What exactly is the cause of the appearance of most of these symptoms must begin to be clarified by identifying possible shortcomings in care. That is, we determine whether the temperature and humidity in the room, the frequency and amount of watering, as well as spraying and fertilizing with fertilizers required for hibiscus. Then, by the method of elimination, we determine the possible, and, most often, real causes. If they consist in improper care, then we eliminate the mistakes made. And how to deal with other causes will be discussed later.

3 All about hibiscus diseases - types, symptoms and causes

The most common hibiscus diseases will be described below. Most of them are manifested in a change in the appearance of the leaves. Let's start with these ailments in order of their prevalence. Leaf diseases in the vast majority of cases are provoked by chlorosis. This is a disease in which the plant disrupts the formation of chlorophyll and reduces the activity of photosynthesis. The main characteristic signs of this disease in hibiscus are yellowing and/or leaf drop. Chlorosis is of two types - non-infectious and infectious.

Non-infectious rose chlorosis

Most often, the Chinese rose is affected by non-infectious chlorosis. The causes of its occurrence lie in malnutrition: insufficient or excessive supply of nitrogen, potassium, iron and magnesium. Moreover, it should be noted that magnesium and potassium are inherently competing elements. That is, an excess of one causes a deficiency of the second. Symptoms of non-infectious chlorosis in Hibiscus are as follows. With a lack of iron, the leaves turn yellow, and then the leaves fall off. If thinning of the branches is observed, the plant does not bloom at the right time, or its flowers have a pale color (not bright enough), then this indicates a potassium deficiency. When a rose lacks magnesium or nitrogen, the leaves become stained: yellow, whitish or lemon-colored.

Infectious chlorosis, as its name implies, affects the hibiscus due to its infection. The causative agents of this disease of roses are fungal microorganisms, viruses and even pests. The symptoms of infectious chlorosis are as follows: yellowing and subsequent fall of the leaves, as well as general weakness and lack of flowering of the plant. Perhaps the next most common disease is sunburn. Signs of this disease are the appearance of white spots on the leaves, as in the photo. They result from the partial destruction of the chloroform of green tissues under direct sunlight. This usually happens with plants for which the light intensity has changed dramatically - they have been transferred from a less lit place or from a greenhouse to bright sun.

Vascular wilt is the result of infection of hibiscus with fungi of the genus Verticillium or Fusarium. With verticillosis, the leaves of the plant begin to curl from the bottom of the trunk and turn yellow. This process then moves up the stem. In a severely affected rose, only the very top will remain green. If the room is hot, then the leaves wither very quickly, not having time to curl, causing the plant to look like it has been scalded. Fusarium manifests itself in the slow wilting and subsequent death of the leaves without changing their color, that is, they remain green at the same time. The upper leaves may become watery at the edges, and some areas may acquire a pale green or light yellow tint. In both cases, after the defeat of all leaves, the trunk quickly dries up and the plant dies.

Bacterial spotting

Bacterial spotting is a disease, the manifestations of which can be observed not only on the leaves, but also on the shoots. Basically, this ailment in Hibiscus is caused by bacteria of this kind, such as Xanthomonas. This disease most often affects young shoots and leaves. Depending on the specific type of pathogen, the symptoms of the disease may vary slightly. The most characteristic and common picture is when watery yellow small spots first appear on the stems and leaves (seen in the photograph), which gradually turn black. The shape of the spots is most often irregularly angular, and a light green or yellow border is visible along their contour. The spots gradually increase in size and then merge. As a result, the entire sheet turns black. So the disease progresses throughout the plant and eventually it dies.

Another variant of spotting caused by bacteria is bacterial burn. Its causative agent is other bacteria belonging to the genus Pseudomonas. Most often, a bacterial burn begins with young shoots, leaves and flowers. Its symptoms are as follows. It is not spots that form on the plant, but immediately rather extensive shapeless blackening areas (as in the photo), which soon dry out. Outwardly, such areas on the sheet look as if it was burnt in this place. The progression of a bacterial burn causes first the death of individual parts of the plant, and then its death. Under favorable conditions, this disease develops very quickly.

When affected by brown rot, the hibiscus stems turn brown and thin at the very base. The rose is greatly weakened and may die. Most often, this disease affects young seedlings and plants.

4 Treating diseases and dealing with the consequences of some care mistakes

Most of the problems that have arisen with hibiscus are solved by normalizing the conditions of its maintenance and eliminating errors in care. Since the purpose of this article is not to consider exactly how to care for the Chinese rose, all these points will be omitted. Let us dwell only on the elimination of a number of specific omissions in care, indicated above in the chapter on the main symptoms of plant deterioration. In case of insufficient humidity in the room, the plant should be sprayed more often - not once, but several times a day. At the same time, waterlogging of the soil should not be allowed - so that after such a “shower” the water is already standing in a pot. If the Hibiscus is hot, then in the room with it, you should try to lower the temperature, and you should also shade it and spray it.

Chinese Rose Fertilizers

When a plant lacks some nutrients, then, of course, it is necessary to feed it with appropriate preparations, which include precisely the missing elements. If the roots become waterlogged in winter, then watering should be temporarily reduced in quantity and volume, and the plant itself should be sprayed instead, making sure, again, that less water gets into the soil and it does not turn into a liquid slurry. What to do in case of drafts is clear and so - it is necessary to eliminate the cause of their occurrence or move the Chinese rose to another, more peaceful place.

Now about the treatment of diseases. Non-infectious chlorosis can not only be defeated, but also prevented by regular feeding of Hibiscus with fertilizers. If, nevertheless, this misfortune happened, the emphasis should be placed precisely on those dressings that contain the missing elements. It should also be noted that the symptoms of iron deficiency (yellowing of the leaves) appear against the background of a lack of nitrogen and an increased content of chlorine and calcium in the water used for irrigation. Therefore, before watering, the water must be defended, and then a microfertilizer such as iron chelate should be added to it. The latter should be done if there is indeed an iron deficiency. And you need to monitor the sufficiency of the amount of fertilizing containing nitrogen.

Infectious chlorosis is best prevented. To do this, contact of the Chinese rose with diseased plants should not be allowed, it must be timely transplanted and fertilized, and it must also be regularly cleaned of dust and dirt. The latter is best done by washing the hibiscus in the shower. At the same time, the soil in the pot must be covered with cellophane. And yet, all new plants brought home must necessarily undergo a temporary quarantine procedure. That is, for several weeks they must be placed separately and away from existing flowers. In case of hibiscus disease, use appropriate preparations (designed to combat identified diseases and pests) to treat it.

To prevent sunburn, Chinese roses grown in greenhouses and growing in a darkened room should be accustomed to changing lighting gradually, taking them out in the sun for an hour and a half a day. Then we gradually increase the duration of the plants' stay in bright light, and only after full adaptation to it do we change their “place of residence”. If, nevertheless, the hibiscus got burned, it's okay. He quickly gets used to the change in lighting, and the leaves that have received burn spots simply fall off, giving way to new normal ones that soon grow.

Zircon for rose processing

Vascular wilt is very difficult to treat and it is not always possible to heal hibiscus from it. Often he quickly dies and at the same time it happens that he did not even have time to fall off the leaves. To fight this disease should be as follows:

We cut off all the affected (dried) fragments of the plant, while slightly capturing its healthy parts.

We process the whole rose with special antifungal compounds: Fundazol, Topsin, Dezavid, Alirin-R or others. You can also use the drug Rovral, the solution of which must be poured under the root. There is also a folk remedy - spraying the plant with a solution of Trichopolum (2 tablets per 1 liter of water).

Additionally, you can stimulate the protective mechanisms of the rose by treating it with Epin, Zircon, Domotsvet preparations. You just need to make sure before that that the selected composition can be used in combination with the antifungal agent used.

If at the initial stage it was not possible to cure vascular wilt, and the hibiscus continues to hurt and wither, it will have to be destroyed. Bacterial spotting is remarkably cured by spraying the plant itself with simultaneous watering of the soil in a pot with a solution of Trichopolum (1 tablet per 2 liters of water). Also effective are such well-known copper-containing preparations as copper sulfate and Bordeaux mixture. Not only for treatment, but also for prevention, you can still use Fundazol, Euparen. To prevent damage by brown rot, hibiscus cuttings and seedlings must be treated with Rovral. In addition, seedlings should be planted shallow, and after planting, carefully sprayed with the same preparation.

5 What to do if the plant is stressed?

When a plant is stressed, the first thing to do is try to figure out what caused it. If the reason is the onset of a strong deviation of the conditions of detention from those necessary for hibiscus, then it must be eliminated. The plant is unlikely to adapt to this, especially if the changes that have occurred are in principle unacceptable for its life. Stress can also occur due to the fact that the rose is greatly disturbed, for example, they often change her “place of residence” (they are constantly transplanted or transferred from one place to another, which usually happens during repairs and relocations) or do not monitor the behavior of children and pets that show excessive curiosity about houseplants.

Signs of Stress in Hibiscus

Such impacts on the plant must also be immediately stopped. In the first case, the hibiscus should, at least for a while, be left alone until it copes with stress (stop transplanting or choose the most suitable place for it, from which it will not need to be transferred for a relatively long time). In the second, to forever protect the plant from domestic "robbers", that is, for example, to find a place inaccessible to them.

Stress can also be caused by minor changes in the conditions of detention, when their main parameters are within acceptable values (associated with: transfer from one room to another or from a greenhouse to a permanent habitat; with slight deviations from the previous care), seasonal changes in the environment environment (for example, a decrease in the level and duration of lighting in winter), any damage, transplantation or flowering (also stressful for young and weakened plants). In this case, no drastic measures will have to be taken.

Well, with the stress itself, the Chinese rose, as a rule, is able to cope on its own. In the first two cases, this will happen after the elimination of the causes that provoked it, and in the last - due to adaptation to new conditions. But in order for the plant to successfully and quickly cope with stress, it is necessary for it to provide peace, spray more often and more carefully monitor compliance with the schedule and norms of watering and feeding, as well as the quality of the water and fertilizers used for this.

In addition, hibiscus can be helped to stimulate adaptive processes in it with the help of anti-stress drugs, especially if the stress state does not go away for a long time and the plant is severely weakened. These include: Zircon, Fitosporin, Planriz, Epin-Extra, Planriz, Krezatsin. Such preparations have an immunostimulating and anti-stress effect on plants. It is necessary to choose and use the desired “drug” in accordance with the instructions for it.

6 Common pests and their control

Pests start on a plant in two cases: when they are transplanted into infected soil or as a result of contact with already diseased flowers. Hibiscus is most often affected by the following pests.

Aphid. This small insect settles primarily on young leaves and shoots, as well as on plant buds. It multiplies very quickly, creating entire colonies. It is able to completely destroy unopened flowers and young leaves, which at the initial stage of the lesion become sticky and deformed. It is necessary to fight aphids by treating the plant with preparations Akarin, Fitoverm, Biotlin, Intra-Vir, Decis. Nicotine sulfate and tobacco dust also help a lot. In the early stages and in cases of a single partial defeat of the leaves, it is sufficient to confine oneself to processing with an ordinary soapy solution.

Signs of a spider mite

Spider mite. You cannot see this pest without a magnifying glass, especially since it settles under the leaves. The latter, when struck by a tick, first fade and become covered with small yellow specks, which is clearly visible in the photograph. The pest envelops the underside of the leaves with a dense web, in which it lives. Subsequently, if measures are not taken immediately, extensive dried patches form on the leaves. The fight against a tick includes washing the leaves with soapy water or mineral oil and subsequent treatment of the plant with preparations Akarin, Lightning, Vertimek, Fitoverm.

Whiteflies. They usually hide on the underside of the leaves, where you can find their adults and pale yellow larvae (shown in the photo). A characteristic sign of damage to a plant by a whitefly is the appearance of a shiny sticky coating on the upper side of the leaves. These are pest excrements. After some time, soot fungi develop in them, due to which the surface of the leaves becomes first white and then black. It is these fungi that can cause severe damage to the plant, and not the whiteflies themselves. In addition, this pest is a carrier of various viral infections. The symptoms of whitefly-borne diseases can be very different. This is chlorosis, and the leaves may turn yellow, deform, curl.

It is necessary to fight this pest by treating the plant with a solution of potassium soap or Aktara, Admiral, Biotlin, Bankol, Spark, Appleud, Fufanon, Tanrek preparations.

Worms. Signs of damage to the plant by them: waxy lumps and powdery coating of white color appear in the axils of the leaves and on the cuttings, as in the photograph. Methods of struggle: treatment with the same preparations as for the whitefly.

Shields and false shields. Signs of damage: pale brown or brownish rounded scales (tubercles) appear on the stems and leaves of the rose, which can hardly be separated from the plant. These are adults of the pest. With a slight lesion, we clean the scales with a cloth or a toothbrush dipped in a soapy or alcohol solution. A kerosene-soap emulsion also helps well. In case of severe damage, we use one of the above insecticides.

Midge gall midge. Signs of defeat: leaves and still unblown buds turn yellow and fall off. It is necessary to inspect the buds and identify all the affected ones. Small eggs of the pest will be visible in them. All these and yellowed buds must be cut off. They must not be allowed to fall to the ground. Then we cultivate the land with one of the above insecticides.

published on cemicvet.ru according to the materials nasotke.ru

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Hibiscus diseases

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Hibiscus are quite resistant to diseases, with proper care they rarely get sick. When kept indoors, the owners often have to deal with an attack on plants by aphids, scale insects, to find out why the leaves of the hibiscus turn yellow, why the buds do not open. Diseases are often the result of plant care errors.

Chinese hibiscus disease

It is recommended to wipe the leaves of the Chinese rose once a week with a damp cloth, some housewives add a little sugar to the water, the greens become brighter. Do not overwater hibiscus, the earth should dry out between waterings. The flower can be attacked:

1. Scale insects, false scale insects - the leaves dry up, fall off, brown spots of scale insects are visible on the surface of the leaves.

2. Aphids - foliage turns yellow, curls, falls off;

3. Scales - white coating on the veins, a colony of pests is treated with M-30 mineral oil, scales suffocate under the oil film;

4. Greenhouse whitefly - an adult insect lays larvae on the underside of the leaf, the leaf is covered with a sticky coating, turns yellow.

5. Spider mite - yellow specks appear on the leaves, which then discolor and dry out. The tick lives on the inner surface of the leaves in the web.

Pest Control Measures

From scale insects, the bush is sprayed with Aktellik's solution (dilute 1.5 ml of the drug in 1 liter of water).
When attacked by aphids, they are treated several times, it is recommended to change the preparations. The plant is sprayed with solutions of Decis, Inta-vir, Aktellik, Fitoverm.
The treatment of affected leaves with mineral oil (M-30, M-50) saves from the worm. In this case, the worms suffocate under the film formed from the oil. The procedure must be carried out out of the sun.
The whitefly is destroyed by Aktara, Karbofos.
With a spider mite, the leaves are treated with soap, if it does not help, then Fitoverm, Akarin, Vertimek, Lightning.

Viral diseases

1. Bronzing - the surface of the sheet becomes stained, wrinkled, coarsens; 2. Ring spotting - yellow spots in the form of rings form on the leaves.

Bronzing hibiscus

Ring spot on hibiscus

Viral diseases are not treated; at the first sign of the disease, the plant is destroyed.

Diseases of garden hibiscus (Syrian)

The plant requires shelter for the winter, in the southern regions they cover the first 2-3 years, in the north an adult hibiscus also needs shelter. In the spring, the bush is pruned: last year's young branches are shortened, and the old, diseased, frostbitten branches are cut out, trying to make a cut near the ground. Without pruning, the plant blooms worse, loses its decorative effect, the lower part of the trunk is exposed.

The trunk may be exposed due to leaf fall as a result of chlorosis. Excessive calcium content reduces the absorption of iron and nitrogen by the plant, the yellowing of hibiscus can serve as a signal to apply fertilizers containing iron. Nitrogen fertilizers are added sparingly, especially during flowering. Excess nitrogen leads to increased growth, the bush looks lush, with dense bright greens, but does not bloom.

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How to protect indoor hibiscus from pests and diseases

spider mite

To combat aphids, the following methods are used: first they should be removed from the leaf and stem with a cotton pad, and then treated with soapy water or special preparations (Aktara, Iskra).

Gallica

Diseases and their causes

Chlorosis

sunburn

Sunburn looks like a small reddish or yellowish dry spot on the surface of the leaf plate. Measures to save the hibiscus are best taken immediately, because the longer you delay, the more rehabilitation the flower will then need.

Treatment and prevention

In order to eliminate the effects of a sunburn, you need to remove all damaged hibiscus leaves, as well as optimize the conditions of detention - for example, put in a darker place.

To keep your hibiscus leaves safe and sound, follow these simple guidelines:

In this video, an expert will talk about how to save indoor plants from pests and diseases.

Yellowing Leaves and Other Hibiscus Problems - Part 4

1) The buds do not open and fall off.

The reason is that the plant is under stress (a sharp violation of the conditions of detention): drought or vice versa there is not enough moisture, the temperature is too low or too high.

2) Simultaneous yellowing of leaves (up to 40%).

Possible reasons:

change in conditions of detention, insufficient watering (especially in the heat);

excessive watering (too short intervals between watering, the situation is aggravated at low temperatures) or, for example, the plant is overdried (forgot to water), and then filled with water, mistakenly assuming thus to improve the situation;

overheating of an earthen coma with a simultaneous deficiency of moisture in the soil;

too low (high) ambient temperature;

too much direct sunlight during the daytime during May/August; the situation is aggravated by high temperature and low humidity;

3) During the growing season, there is no vegetative growth, and the leaves may turn yellow, there is no flowering.

poor lighting of the plant;

the plant is infected with pests (aphids, spider mites);

the plant is under the influence of a draft (wind).

4) The sheet is deformed, twisted, the structure becomes rigid.

The reason is the plant's phytotoxic reaction to chemical treatment. drugs.

5) The leaf turns brown along the edge of the leaf plate.

The reason is too frequent top dressing and (or) too high concentration of fertilizer, and (or) top dressing was carried out on a dry substrate.

Water the earth ball with plenty of water (to flush out excess fertilizer).

6) The edges of the petals of the flower are wrapped (the defect occurs in plants that are kept outdoors).

The reason is excessive watering in the heat and (or) exposure to sunlight in the morning on a dew-covered petal.

7) The plant is infected with diseases of viral, bacterial or fungal origin.

7.1 Symptoms - Rusty spots appear on hibiscus leaves.

The reason is a disease of fungal origin Alternaria. Plants suffering from nutritional deficiencies are usually affected. The disease worsens during periods of high humidity. Foliar the plant, treat it with Zineb or Benlate fungicides.

7.2 Symptoms - Hibiscus leaves become covered with black spots and marks (especially in cool weather).

The reason is a fungal disease that primarily affects weakened plants. Treat the plant with Benlate or Zineb fungicide, revise the conditions of its maintenance.

7.3 Symptoms - Hibiscus leaves and flowers are curled, flowers are faded.

The reason is a viral disease. The plant is disposed of.

7.4 Symptoms - the stems of the plant turn black, depressions form at the site of the lesion. Symptoms appear in autumn/winter time.

The reason is a fungal disease. Treatment is not carried out - the plant is disposed of.

But, despite this, agricultural technology in the cultivation of the "Chinese rose" is very important and its non-compliance leads to pest infestation and disease development.

Chlorosis - this is a disease in which the green parts of the plant change their color to yellow, lemon or whitish due to a decrease in the amount of chlorophyll. This disease is non-infectious and infectious.

Non-infectious chlorosis appears with violations in the nutrition of the plant: lack or excess of nitrogen, magnesium, potassium, iron. Potassium and magnesium are inherently competing elements. An excess of one leads to a deficiency of the other. Potassium is essential for flowering plants. With its deficiency, the plant does not bloom, or the flowers are slightly colored, and the branches are thin. Magnesium deficiency leads to chlorosis. Iron deficiency also causes yellowing and leaf fall. In order to prevent this, the water for watering the plant must be defended and iron chelate added to it.
infectious chlorosis caused by viruses, fungi and pests. Dust removal, timely fertilization, transplanting and pest control will help to avoid these diseases.

Sunburn. Direct sunlight, falling on a plant that has not yet adapted, partially destroys chloroform in them, as a result of which the leaves become covered with white spots of burns. This temporary phenomenon is observed if the flower was moved from a greenhouse or a place with a lack of consecration to the bright sun. The hibiscus quickly adapts to changes in light and new leaves will grow back normally. To avoid the loss of decorativeness and not to injure the plant, it must be accustomed to change by taking it out into the sun for an hour a day, gradually increasing the length of stay.

Diseases caused by pests

Greenhouse and tobacco whiteflies. When the plant is affected, its leaves turn yellow and become covered with sticky secretions. Pale yellow larvae or adult white-winged insects can be seen on the underside of the leaves. To combat and prevent the disease, the plant is treated with potassium soap solutions or Biotlin, Fufanon, Aktara, etc.

Spider mite (web on hibiscus). In the affected plant, the leaves fade and become covered with yellowish specks. Subsequently, extensive dried areas appear on them. The underside of the leaves is covered with a web in which the pest lives. To combat and prevent the disease, it is necessary to wash the leaves with soap or mineral oil, and also treat with Lightning, Fitoverm, Akarin, etc.

Aphid. Aphids are attracted to the young leaves and buds of the plant. When damaged, they deform and become sticky. For the prevention and control of the disease, the plant is treated with soapy water, tobacco dust, Biotlin, Akarin, Decis, etc.

Worms. White waxy discharge appears on the petioles and in the axils of the leaves. To combat the disease, the plant is sprayed with Aktofit or treated with mineral oils.

Shields and false shields. Brownish or pale brown tubercles appear on the stems of the plant. With a small damage to the plant, the pests are removed mechanically, and the affected areas of the plant are wiped with kerosene or mineral oil. With severe damage, the plant is best treated with an insecticide.

Bacterial spotting. The edges of the leaves of the affected plant are covered with rotting yellow spots. For the prevention and treatment of the disease, the plant is systematically examined and treated with Fundazol, Cumulus, Euparen, etc.

Brown rot. Most often affects young plants and seedlings. In the affected plant, the stems turn brown and thin at the very base. To prevent the disease, cuttings and seedlings are treated with Rovral. Seedlings should be planted shallow, carefully spraying after.

Vascular wilt. Called by fungi. In the affected plant, the branches and trunk rapidly dry out, sometimes not having time to lose foliage. To treat the disease in the affected plant, the damaged parts are cut out and treated with an antifungal drug.

Midge gall midge. In affected plants, the buds turn yellow and fall off without even blooming. Midges midges lay their eggs in tiny hibiscus buds, so to prevent the disease, yellowed buds are collected, preventing them from falling, and the soil under the flower is treated with a preparation from soil pests.

Symptoms of diseases

Hibiscus leaves turn yellow. The most likely causes of the disease are pest damage (aphids, spider mites), diseases of the root system, insufficient air humidity or leaf chlorosis. The causes of chlorosis is the excess of the content of chlorine and calcium in the water for irrigation with a lack of nitrogen and iron. Water for watering the plant should be defended and iron chelate added.

Hibiscus leaves are falling. Stress, lack of moisture. It is necessary to create peace for the plant and spray.

Indoor hibiscus - leaves turn yellow and fall off. Stress, insufficient humidity, draft, waterlogging of the roots in winter. It is necessary to create peace for the plant, spray it, making sure that the kidney does not turn into a liquid mess.

Why do hibiscus leaves curl?. The plant is affected by aphids. Needs to be treated for pests.

Hibiscus leaves wither. Nutrient deficiencies. It is necessary to feed the plant with nitrogen and phosphorus preparations.

Withering hibiscus. The plant is too hot. It is necessary to reduce the temperature in the room, shade, spray.

Why do hibiscus drop buds? The plant is too hot. The soil lacks potassium fertilizers. The buds are affected by the midge gall midge.

What to do if he dies?

If your Chinese rose is sick, do not despair, it may be possible to resuscitate it. Hibiscus is unpretentious, and it is quite possible to treat it at home.

At the moment, many preparations have been developed for pest control, they can be purchased at specialized stores or you can use folk methods by treating the plant with a solution of soap, tincture of tobacco or pepper.

Folk remedies for hibiscus pest control

Pepper tincture (from aphids, ticks) - Dry pepper is poured with water in a ratio of 1: 2 and boiled for an hour, then insisted and filtered. For spraying a plant, 10 g of the drug is diluted in one liter of water and soap. Soap should be taken about 5g per liter.

Tobacco tincture (from aphids, thrips, ticks) - 1 kg of tobacco dust or tobacco is boiled in 10 liters of water for two hours. Insist for two days and filter. Before use, the concentrate is diluted in 10 liters of water with 50 g of soap.
Soap solution. To prepare the preparation, 200 g of potassium soap is diluted in 10 liters of water.
Mustard tincture (for ticks, aphids) - 50g of mustard is boiled in a liter of water and insisted. Before use, the concentrate is diluted in 20 liters of water.

Agricultural technology is of great importance when keeping hibiscus: soil acidity, heat and light conditions, air and soil humidity. Create comfort for the flower: do not move, treat pests, loosen the soil and water once a week and gradually the hibiscus will grow new leaves.

A photo

See more related photos below:

With a small circle of friends, we were once lucky enough to have hibiscus trees at home - each has one tea rose in the most prominent place. Hibiscus has always shown itself to be an obedient flower, it was pleasant to deal with it, it did not get sick and was not capricious, but recently I noticed that hibiscus began to get a little sick, so I had to look through all possible diseases in order to exclude inappropriate options and still find the root of the problem.

Hibiscus diseases can be caused by several factors: poor care, changing weather conditions (this is especially true for garden hibiscus), as well as damage by viruses and pests.

Hibiscus diseases, as I know, can be attributed to dark spots on the sheets. The darkening of some sections of the hibiscus leaves by a fungus that affects the plant against the background of any changes is caused, simply - a weak plant is an easy prey for the fungus to colonize new territories. To cure hibiscus from this scourge, you need to carry out constant processing of the leaves of the plant. There are special fungicidal preparations that perfectly fight the problem, as well as laundry soap available at home, which, by the way, copes with most pests. It is necessary to exclude excessive moisture in the air or soil in order to prevent fungi from actively developing.

Hibiscus can also be affected by mold. You may have noticed the first white bloom on the bottom leaves of the hibiscus, but you didn't notice it until the mold began to spread to large areas of the hibiscus, and its general condition left much to be desired. Mold can be fought according to the same principles as with a fungus, only during the treatment period it is important to exclude top dressing, since active fertilizers will act in a completely unexpected way.

Viral infection. This disease is very complex, it is similar in symptoms and development to human cancer, although it is transmitted virally. You may notice yellow stripes on the leaves - these are the places where the infection occurs, after which the hibiscus roots will rot. In a couple of months, the plant will “burn out” and, unfortunately, you will no longer be able to enjoy its pleasant flowering and beneficial properties. The fight against a viral infection is fundamentally different from other methods of treatment: you need to completely destroy the plant, and remove the soil and the pot in which it was located. The key answer to the question “why should I do this?” there will be a viral infection. You run the risk of infecting other plants that bloom harmlessly nearby. In addition, if you want to propagate or replant, purchase hibiscus, for some time it cannot be put on the place of the old hibiscus's former habitat - after all, a virus, after all, is a serious matter.

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Video: How to plant garden hibiscus?

Hibiscus is a fairly hardy plant and can forgive some care mistakes. But, despite this, agricultural technology in the cultivation of the "Chinese rose" is very important and its non-compliance leads to pest infestation and disease development.

Chlorosis - this is a disease in which the green parts of the plant change their color to yellow, lemon or whitish due to a decrease in the amount of chlorophyll. This disease is non-infectious and infectious.

Non-infectious chlorosis appears with violations in the nutrition of the plant: lack or excess of nitrogen, magnesium, potassium, iron. Potassium and magnesium are inherently competing elements. An excess of one leads to a deficiency of the other. Potassium is essential for flowering plants. With its deficiency, the plant does not bloom, or the flowers are slightly colored, and the branches are thin. Magnesium deficiency leads to chlorosis. Iron deficiency also causes yellowing and leaf fall. In order to prevent this, the water for watering the plant must be defended and iron chelate added to it.
infectious chlorosis caused by viruses, fungi and pests. Dust removal, timely fertilization, transplanting and pest control will help to avoid these diseases.

Diseases caused by pests

Worms. White waxy discharge appears on the petioles and in the axils of the leaves. To combat the disease, the plant is sprayed with Aktofit or treated with mineral oils.

Symptoms of diseases

Hibiscus leaves are falling. Stress, lack of moisture. It is necessary to create peace for the plant and spray.

Why do hibiscus leaves curl?. The plant is affected by aphids. Needs to be treated for pests.

Hibiscus leaves wither. Nutrient deficiencies. It is necessary to feed the plant with nitrogen and phosphorus preparations.

Withering hibiscus. The plant is too hot. It is necessary to reduce the temperature in the room, shade, spray.

Why do hibiscus drop buds? The plant is too hot. The soil lacks potassium fertilizers. The buds are affected by the midge gall midge.

What to do if he dies?

If your Chinese rose is sick, do not despair, it may be possible to resuscitate it. Hibiscus is unpretentious, and it is quite possible to treat it at home.

Folk remedies for hibiscus pest control

A photo

Known to most indoor flower lovers, the Chinese rose or hibiscus (Hibiscus rosa-sinensis) is considered an exquisite and luxurious plant and is grown by many flower growers at home. This indoor pet attracts attention with its unusually bright and large red, pink, lilac, yellow or white flowers against the background of juicy rich green foliage.

Hibiscus is a capricious plant, it is necessary to care for it strictly according to certain rules. Indeed, with the slightest change in favorable conditions, the Chinese rose responds with the loss of its decorative qualities. Then suddenly the leaves begin to turn yellow, and then a real leaf fall happens. This behavior of an indoor flower must have an explanation. It is possible that this is due to a disease or the appearance of pests, or maybe the hibiscus is under stress. It is important for the flower grower to quickly establish the cause of the negative changes and take urgent measures to save the plant.

Violation of the irrigation regime

Hibiscus over the age of four to five years needs a lot of irrigation water every day, as its root system requires it. Between waterings, the soil in the flower pot should not be wet, but always slightly moistened. An excess of moisture in the soil can lead to compaction of the soil and poor air permeability, which will lead to rotting of the root part and waterlogging of the soil surface.

In stagnant water and marshy soil, favorable conditions are created for the appearance of harmful bacteria and various fungal diseases. Under such conditions, the root system of the plant begins to slowly die. She no longer has enough nutrients for the growth and development of the flower, so the leaves begin to turn yellow and gradually fall off. This process must be stopped at an early stage, then the hibiscus can still be saved.

Usually a young plant can not cope with abundant watering. It is recommended to urgently remove it from the flower container, rinse the roots, all rotten and blackened parts must be completely cut off. Then it is necessary to treat all the cut points and the remaining roots with fungicides, sprinkle with the Kornevin preparation and transplant the indoor flower into a new flower container and a fresh substrate. Immediately after planting, it is necessary to spray the entire crown of the Chinese rose with a solution based on Epin.

In an adult hibiscus, the foliage often turns yellow and falls due to a lack of moisture in the soil. Constant overdrying of the earthy coma depletes not only the root system, but leads to the withering of the entire leaf mass. In this case, it is almost impossible to save a houseplant.

Insufficient lighting

The rose can thrive in full sun and grows well in shady conditions. But sudden changes in light levels (for example, moving hibiscus from outdoors to indoors and vice versa) can lead to yellowing and loss of foliage.

When a flower moves into a poorly lit room, it is necessary to use fluorescent lamps and illuminate it for some additional hours a day to prevent the plant from falling into a stressful state. When transferring hibiscus from the house to the street, it is very important not to immediately put it in direct sunlight, but to do it gradually. First, you need to shade the flower at noon and protect it from sunburn.

Violation of the temperature regime

Chinese rose prefers to be kept in warm conditions with a temperature of 18 to 30 degrees Celsius. Lowering and raising the temperature beyond these limits adversely affects the plant. It is also not recommended to allow cold drafts and sudden changes in temperature. In a cool room, you need to put a heater, and in a hot room, use spraying and raise the humidity level.

When fertilizing the soil with indoor plants, you need to know exactly which nutrients are important for a given specimen. An overabundance or lack of certain substances can harm a pet. For example, elements such as magnesium and potassium are very important for the development of hibiscus and should be present in an increased amount. But a large amount of nitrogen and phosphorus can cause a discoloration of the leaves and lead to complete yellowing. There is even such a thing as a “nitrogen burn”. That is why experienced flower growers recommend choosing such dressings that contain a lot of potassium, and without nitrogen-containing and phosphate fertilizers, the Chinese rose will not disappear. The nutrient mixture should only benefit the indoor flower.

Pests

One of the most dangerous and common hibiscus pests is the spider mite. It is almost impossible to notice its appearance at first. The leaves of a houseplant turn yellow, wither and begin to fall off actively and in large quantities, and it is not immediately possible to understand that the cause is the appearance of a pest. Only after some time, with the naked eye, you can see small black dots (with barely noticeable movement) on the thin threads of the web.

There is no way to do this without the help of various chemicals. Specialized retail chains for gardeners and florists offer drugs such as Fitoverm, Aktara, Aktellik to combat spider mites. With their help, the crown of the shrub and the whole plant as a whole are processed.

The appearance of the disease - chlorosis

This disease is capable of completely destroying the plant in a short time. First, the leaves die, and then gradually the shoots and the whole flower. Hibiscus suffers from chlorosis when the soil is moistened with hard irrigation water, with a large amount of alkali in the soil, with an insufficient amount of fertilizers and fertilizing, as well as with a lack of iron. You can save an indoor flower by transplanting it into a new soil mixture and adding fertilizers containing iron to it.

natural causes

Some houseplant lovers begin to panic even if one or two leaves have fallen from the hibiscus, or they have turned a little yellow. This happens when the hibiscus is actively developing, it has a lot of new leaves, and the old ones die off. There is nothing terrible in this process, natural changes occur in wildlife.

Prevention of hibiscus diseases and preventive pest control measures (video)

Optimal temperature

What lighting to choose

How to water

Difficulties in Growing Hibiscus

How to plant Angel Wings

Pests and diseases

Spider mites

Aphid

leaf chlorosis

This disease is typical for hibiscus. Chlorosis occurs due to improper care of the flower. Signs of the disease:

change in the shape of the leaves;
the appearance of brown spots;
dry petals;
buds do not bloom and fall off.

Foreword

Chinese rose

So, all currently known diseases of the Chinese rose can affect it due to the following care errors:

placing the plant in a draft, under the wind or direct sunlight;
excessive watering, resulting in rotting of the roots;
placement in a dry or hot room;
contamination and dustiness of the plant, especially its leaves;
lack of spraying or when they are extremely rare, especially in summer;
watering with poor quality water (containing a lot of harmful impurities or not settled);
poor lighting, and sometimes the turn of the flower with the back to the sun;
"overfeeding" with fertilizers;
lack of fertilizing with fertilizers and transplants;
allowing contact with already diseased plants, as a result of which the hibiscus is affected by diseases and pests.

All these violations in care, subject to their systematic impact on the Chinese rose, provoke various diseases in it. If this plant is provided with favorable conditions, or at least not injured by its careless attitude, then it grows for quite a long time and always pleases with its flowering every year from April to October, or even longer.

yellowed hibiscus leaves

If the hibiscus has leaves:

Turned yellow - the plant is infected with pests (spider mites or aphids), its roots turn white, leaf chlorosis, or insufficiently humid air in the room.
Turned yellow and fall off - stress (occurs when adverse factors occur or a sharp change in conditions of detention), drafts or insufficiently humid air in the room, and in winter also from waterlogging of the roots.
Fall off - insufficiently humid air in the room, stress, a sharp change in the intensity of lighting or drafts.
Wither at the tips - the plant lacks phosphorus and nitrogen, and also, most likely, some other nutrients.
Twisted into a tube - pest damage, most likely aphids.
They fall along with the flower buds - it is too hot in the room, the plant lacks potassium, or it is affected by a pest (midge gall midge).
Wither along with the whole plant - the room is too hot or the humidity is below critical levels for the Chinese rose.

Non-infectious rose chlorosis

Infectious chlorosis, as its name implies, affects the hibiscus due to its infection. The causative agents of this are fungal microorganisms, viruses and even pests. The symptoms of infectious chlorosis are as follows: yellowing and subsequent fall of the leaves, as well as general weakness and lack of flowering of the plant. Perhaps the next most common disease is sunburn. Signs of this disease are the appearance of white spots on the leaves, as in the photo. They result from the partial destruction of the chloroform of green tissues under direct sunlight. This usually happens with plants for which the light intensity has changed dramatically - they have been transferred from a less lit place or from a greenhouse to bright sun.

Bacterial spotting

When affected by brown rot, the hibiscus stems turn brown and thin at the very base. The rose is greatly weakened and may die. Most often, this disease affects young seedlings and plants.

Chinese Rose Fertilizers

Now about the treatment of diseases. Non-infectious chlorosis can not only be defeated, but also prevented by regular feeding of Hibiscus with fertilizers. If, nevertheless, this misfortune happened, the emphasis should be placed precisely on those dressings that contain the missing elements. It should also be noted that the symptoms of iron deficiency (yellowing of the leaves) appear against the background of a lack of nitrogen and an increased content of chlorine and calcium in the water used for irrigation. Therefore, before watering, the water must be defended, and then a microfertilizer such as iron chelate should be added to it. The latter should be done if there is indeed an iron deficiency. And you need to monitor the sufficiency of the amount of fertilizing containing nitrogen.

Zircon for rose processing

We cut off all the affected (dried) fragments of the plant, while slightly capturing its healthy parts.
We process the whole rose with special antifungal compounds: Fundazol, Topsin, Dezavid, Alirin-R or others. You can also use the drug Rovral, the solution of which must be poured under the root. There is also a folk remedy - spraying the plant with a solution Trichopolum(for 1 liter of water 2 tablets).
Additionally, you can stimulate the protective mechanisms of the rose by treating it with drugs. Appin, Zircon, House flower. You just need to make sure before that that the selected composition can be used in combination with the antifungal agent used.

If at the initial stage it was not possible to cure vascular wilt, and the hibiscus continues to hurt and wither, it will have to be destroyed. Bacterial spot is remarkably cured by spraying the plant itself while watering the soil in the pot with a solution Trichopolum(for 2 liters of water 1 tablet). Also effective are such well-known copper-containing preparations as copper sulfate and Bordeaux mixture. Not only for treatment, but also for prevention can still be used Fundazol, Euparen. To prevent damage by brown rot, cuttings and seedlings of hibiscus should be treated with a means Rovral. In addition, seedlings should be planted shallow, and after planting, carefully sprayed with the same preparation.

Signs of Stress in Hibiscus

In addition, hibiscus can be helped to stimulate adaptive processes in it with the help of anti-stress drugs, especially if the stress state does not go away for a long time and the plant is severely weakened. These include: Zircon, Fitosporin, Planriz, Epin-Extra, Planriz, Krezatsin. Such preparations have an immunostimulating and anti-stress effect on plants. It is necessary to choose and use the desired “drug” in accordance with the instructions for it.

The most common pests and their control

Pests start on a plant in two cases: when they are transplanted into infected soil or as a result of contact with already diseased flowers. Hibiscus is most often affected by the following pests.

Aphid. This small insect settles primarily on young leaves and shoots, as well as on plant buds. It multiplies very quickly, creating entire colonies. It is able to completely destroy unopened flowers and young leaves, which at the initial stage of the lesion become sticky and deformed. It is necessary to fight aphids by treating the plant with drugs Akarin, Fitoverm, Biotlin, Intra-Vir, Decis. Also good help Nicotine sulfate and tobacco dust. In the early stages and in cases of a single partial defeat of the leaves, it is sufficient to confine oneself to processing with an ordinary soapy solution.

Spider mite. You cannot see this pest without a magnifying glass, especially since it settles under the leaves. The latter, when struck by a tick, first fade and become covered with small yellow specks, which is clearly visible in the photograph. The pest envelops the underside of the leaves with a dense web, in which it lives. Subsequently, if measures are not taken immediately, extensive dried patches form on the leaves. The fight against a tick includes washing the leaves with soapy water or mineral oil and then treating the plant with preparations. Akarin, Lightning, Vertimek, Fitoverm.

It is necessary to fight this pest by treating the plant with a solution of potassium soap or Aktara, Admiral, Biotlin, Bankol, Spark, Appleud, Fufanon, Tanrek preparations.