If hibiscus is sick: Chinese rose diseases, treatment methods

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 causes disease 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?

Most often damaging pests and fight them

1 What provokes diseases of the Chinese rose?

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 a 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 harmful room rose impurities or not settled);
poor lighting, and sometimes a flower reversal reverse side 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 her various diseases. If favorable conditions are provided for this plant, or at least it is not injured by a 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

The first signs of a deterioration in health or disease of the Chinese rose in most cases 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 the air in the room is not humid enough.

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 the change appearance 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. Progression bacterial burn first causes the death of individual parts of the plant, and then its death. At 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 exactly 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 are also 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 blue vitriol 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 constantly transplant or transfer 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 for it). appropriate place, 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 the transfer from one room to another or from a greenhouse to permanent place a habitat; with slight deviations from the previous care), seasonal changes in 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 the buds of the plant. 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. On early stages and in cases of a single partial defeat of the leaves, it is sufficient to confine ourselves to processing the usual soapy water.

Signs of a spider mite

Spider mite. You cannot see this pest without a magnifying glass, especially since it settles at the bottom of 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, sooty 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 plant damage by them: waxy lumps and powdery coating appear in the axils of the leaves and on the cuttings. white color as in the photo. Methods of struggle: treatment with the same preparations as for the whitefly.

Midge gall midge. Signs of damage: leaves and more unopened 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.

Hibiscus often decorates not only our homes, but also offices, shops, premises of household services. This plant, in principle, is unpretentious, but it has small enemies: pests and diseases that sometimes seriously annoy the Chinese rose. Knowing what hibiscus diseases are, analyzing their causes, you can prevent diseases, avoid problems by caring for the plant correctly. If troubles could not be avoided, urgent action must be taken.

Hibiscus diseases: some causes

The most common mistakes in caring for a Chinese rose, which beginner flower growers sometimes make, are as follows:

Excessive watering, which caused partial root rot;
Hibiscus stands in the wind, in a draft, or in a zone of direct sunlight;
The plant is in a hot room, while the air is dry;
The hibiscus was not transplanted on time;
Hibiscus leaves are covered with dust;
Complete or partial lack of spraying (especially in summer);
Water for irrigation of poor quality, not settled and with impurities;
Poor lighting, the plant is in a dark place;
Excessive feeding;
Lack of nutrition.

In addition to the above, you need to take into account that you can not put hibiscus next to diseased plants, such contact will lead to damage by pests, to various diseases.

Hibiscus leaves: why they get sick

If the leaves of the Chinese rose are affected, then this is mainly due to the appearance of chlorosis.

This disease occurs due to the fact that the production of chlorophyll in the green parts of the plant is reduced. The leaves lose their natural color, become pale, sometimes almost yellow.

Timely transplantation, lack of contact with already sick pets, regular cleaning of layers of dust, as well as regular application of suitable fertilizers. Sometimes the plant must be bathed under an indirect shower jet, carefully covering the ground with a piece of polyethylene. A new plant needs to be put on a small quarantine.

iron deficiency

Hibiscus sometimes sheds its leaves completely. This phenomenon is a sign of iron deficiency. Most affordable way help the plant, if the hibiscus has completely fallen off - spray it with an iron chelate preparation. The cause of the disease may also be that the fertilizer for the pet is chosen incorrectly: it contains little or no hibiscus necessary useful substances and micronutrients.

Sunburn

As a rule, all hibiscus perfectly tolerate the direct rays of the sun, but if the Chinese rose lived for a long time in a shady place, and then it was placed very sharply on a sunny windowsill (without an adaptation period), then sunburn may occur on the leaves. Outwardly, it looks like slightly yellowish or even red dryish spots. All burnt leaves will have to be removed, and the plant should be accustomed to the bright sun not so sharply.

Sometimes it happens that the leaves are accidentally pressed against the surface of the glass, in which case a burn may also occur. Sunburn is the main reason why hibiscus leaves curl. In order to prevent this phenomenon, all plants that are grown in greenhouses should be taken out to the daytime sun for a couple of hours daily. If at home the hibiscus was in the shade, then you should also put it in the sun for a short time, and then remove it. Gradually, instead of the burnt leaves, new ones will grow, already completely healthy.

Adverse Symptoms

If hibiscus leaves fall, then most likely the room is too dry, and spraying is either not carried out, or it is clearly not enough. Drafts, replacement of lighting (sharp), other stress can also be the cause.
Sharp yellowing a large number leaves can mean both infection with some pests, and diseases of the root system, chlorosis, or insufficient humidity in the room.
If the tips of the leaves wither or dry, then there is a lack of trace elements (for example, nitrogen or phosphorus), other nutrients, and insufficient feeding of hibiscus.
When the leaves become very lethargic, this means that the temperature allowed for the maintenance of the plant is exceeded, which is clearly above the norm.
A sharp yellowing in combination with regularly falling leaves can often mean excessive moisture in the roots in winter, or vice versa, a low level of humidity in the room.
Close attention also deserves the so-called vascular wilt of hibiscus. The rapidity of the development of the disease sometimes does not make it possible to take timely necessary measures and save the plant. It is necessary to cut off very quickly (partially capturing healthy branches) the diseased parts of the hibiscus, then treat the entire plant with any antifungal drugs.

Not enough trace elements

Separately, it is worth dwelling on the lack of nutrients, poor feeding of the plant. So, what to do if the hibiscus is clearly lacking in potassium or magnesium, zinc? When yellow spots appear on the hibiscus, you just need to replace the soil or apply special preparations that will make up for the lack of minerals. For example, if the plant lacks zinc, the leaves become too small, small specks soon appear on the leaves.

If the hibiscus does not have enough sulfur, then the edges of the leaf look brown, and if there is not enough magnesium, then chlorosis may appear on this plant, which occurs between the veins. The sheet becomes as if marbled, partially white, in some places it may appear dark spots. The lack of potassium is most clearly expressed in the partial or complete death of the edges of the leaf, this phenomenon looks very similar to the burn mentioned above.

Aphids, gall midges and other pests on hibiscus

Some inexperienced flower growers do not know why hibiscus leaves curl. Often this phenomenon means that the plant is damaged by aphids or some other pests that are dangerous for the plant. For this reason, it is extremely important not to wait for their appearance, but to periodically carry out preventive maintenance, it is especially important to do this before taking your pet out to the balcony or outside in the warm season, and before bringing the plants into the room in the fall.

If an aphid has appeared on the hibiscus, which is attracted by young and succulent shoots, then this will be immediately noticeable, as the leaves become a little sticky, then they begin to curl, or bend. In this case, all insects are first removed by the usual mechanical method (using a swab and laundry soap). After this procedure, hibiscus must be carefully treated with special aphid preparations that are commercially available. You can also remember about folk methods but they are not always reliable and efficient.

If the usual means and prevention of diseases that were caused by pests were ineffective, while the hibiscus leaf curls or is affected in another way, additional methods of its treatment should be carried out. For example, if aphids are affected, spraying with insecticides (for example, Aktellik preparation) can be done. After two treatments, carried out with an interval of a couple of weeks, as a rule, the plant returns to normal.

Other hibiscus pests are:

Midge gall midge, which causes partial fall, a sharp yellowing of the leaves and buds of indoor hibiscus, sometimes they do not even have time to fully bloom. Upon careful examination of the plant, in the buds you can see the smallest eggs of this midge, then worms will appear from them, which eat the bud inside.
If the plant is affected by the whitefly, the leaves turn yellow, become sticky and sticky, and the insects themselves can be found on the underside of the leaves. The whitefly is removed using potassium soap, as well as special preparations (Aktara or Karbofos, as well as Iskra and Tanrek).
If a tea rose has waxy white discharge (on cuttings, on leaves), then the plant is affected by a mealybug, the leaves can be treated with mineral oil. During the procedures, the plant should stand in a shady place.
If brownish bumps are visible on the leaves, then this may be a scale insect.

It is good to remember the folk remedies with which our grandmothers washed the leaves of domestic plants from pests, aphids and scale insects. For example, red pepper (dry) is poured with water in a ratio of one to two, boiled for an hour and filtered. Ten grams of the solution is diluted in one liter of water with laundry soap, with which the whole plant is treated. Also, in one liter of water, fifty grams of dry mustard can be boiled for 15 minutes. The resulting broth is diluted in 20 liters of water and the affected plant is sprayed.

More about pests: spider mites on hibiscus

If the air in the room is dry and spraying is not carried out regularly, then good conditions for the development of mites on hibiscus, their colonies multiply rapidly, feeding on the juice from the leaves. The appearance of a spider mite can very quickly completely destroy the plant, so you need to know the characteristic signs of its presence. First of all, these are spots on the leaves, they can be brown or black, in fact, they are pest excrement.

The upper parts of the leaves are completely covered with small yellowish spots, the affected leaf loses its natural color, then becomes covered with a web of cobwebs, then falls off. Ticks migrate along the web and destroy the entire plant.

For prevention, you need to monitor the humidity in the room, spray hibiscus regularly, avoiding dryness.

So, if you carefully observe all the necessary conditions to grow a healthy plant, it is unlikely that diseases and pests will bother your hibiscus. Proper care- this is a guarantee of an attractive appearance, rich flowering, as well as strong immunity, which will help the plant to cope even with the invasion of pests on its own.

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

1 What provokes diseases of the Chinese rose?

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 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 favorable conditions are provided for this plant, or at least it is not injured by a 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

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 the air in the room is not humid enough.

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.

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

Bacterial spotting

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

Chinese Rose Fertilizers

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 of Trichopolum (2 tablets per 1 liter of water).

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?

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.

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

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 plant damage by them: waxy lumps and powdery white coating 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.

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.

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 favorable conditions are provided for this plant, or at least it is not injured by a 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 the air in the room is not humid enough.
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

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.

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, hibiscus cuttings and seedlings must 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

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.

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 at the bottom of 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.

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.

Hibiscus, otherwise called Chinese rose, popular ornamental plant with beautiful vibrant colors. On this moment Many varieties have been bred that take root well at home and grow well. Hibiscus, room care at home, which is produced according to all the rules, will delight the owners of the house with its flowering for a long time. So what should be the care 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 severe illness and troubles. 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 Sun 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. Water the flower only with water room temperature, before watering, the water should settle in glass container with a wide mouth. 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 enough 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.

How to plant Angel Wings

Pests and diseases

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

Spider mites

All dry flowers and leaves must be removed in time. If preventive measures were unsuccessful, 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 wet 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 will help here. by special means. After using chemicals, the plant will need more thorough care until it is fully restored.

leaf chlorosis

This disease is typical for hibiscus. Chlorosis is due to improper care behind a 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 it is possible to grow beautiful flowers as experienced flower growers as well as beginners. 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.