Sticky hibiscus leaves. Common diseases of indoor plants: sticky leaves. Organisms that damage the leaf blade

Diseases indoor plants with sticky leaves immediately give out their cause and pathogen.

Causes of sticky plaque

A sticky leaf on any plant means that organic secretions are deposited on its surface with large quantity carbohydrates.

At healthy plant this is possible only if something that sticks to the outer covers of the leaf has got on the leaf blade from the outside. This happens rarely. And if all the leaves of a plant are suddenly covered with something sticky, these are signs of a pathology that develops so quickly that soon not only a few leaves and the whole plant, but also the nearest space around, are covered with a sticky mass. This indicates the presence of a constant process of violation of the integrity of the leaf blade.

Possible consequences

This phenomenon has causes and consequences. The reasons are simple - microorganisms are planted on the plant that damage the leaves. As a result, juice flows from the leaf wound all the time.

Reaching a certain number, the pest forms a sticky cover on the leaves. Since he drinks juice, his secretions are not only thin, but also sticky. As a result, the leaf is covered with a continuous layer of a mixture of its own juice with the secretions of the organisms that eat it.

Such a process may have the following consequences.

1. 1. The plant loses water and nutrients.
2. 2. Fungi, bacteria, viruses can settle on permanent damage, which can cause a new disease.
3. 3. The sticky cover clogs the stomata, making it difficult to breathe and evaporate water.
4. 4. Since the plant is not provided with enough oxygen and carbon dioxide, the formation of organic matter in the process of photosynthesis becomes unproductive. This leads to the loss of the leaf and the gradual withering of the entire plant.
5. 5. Stomata closed with a sticky substance stop evaporating water. As a result, the movement of water from the root hairs to the leaves slows down. For this reason, the supply of minerals to the ground organs of the plant also slows down. This is the reason for the deficiency of minerals. The intensity of bio and photosynthesis decreases. As a result, the plant ceases to bloom and bear fruit, gradually dying.

Thus, a sticky coating on the leaves of a plant is a signal of trouble. Who is responsible for these troubles?

Organisms that damage the leaf blade

It is difficult to identify a pest that destroys a plant. These are mainly insects or mites, that is, multicellular organisms. However, they are so small that it is difficult to see them. In addition, only a specialist can determine the type.

Nevertheless, it is necessary to know the enemies of plants. Here is a sample list of them.

1. 1. Spider mites are the most common houseplant pests. They belong to the arachnids. Their presence is usually detected by indirect signs. Leaf stickiness is the first sign. Then barely noticeable cobwebs appear. If the plant is in bloom, the web concentrates on the flowers. Chrysanthemums, citrus fruits, and roses suffer the most from spider mites.
2. 2. Scale insects, or false scale insects, are small insects from the Hemiptera family. They got their name because they look like they are covered from above with a dense protective shell, similar to a shield. Compared to a tick, they are quite large - they can be seen with the naked eye. They lead a sedentary lifestyle. If you try to remove them from the plant, you can feel resistance. It creates a feeling of adhesion of the shield to the surface of the sheet. They usually concentrate near the veins or on a young shoot.
3. 3. Aphids for houseplants are not as popular as the previous ones. The reason is simple - these insects are larger, so people notice them faster and take action. However, they are colored to match the color of their food supply, which reduces the likelihood of their early detection. Infection with these insects occurs quickly. This is due to their ability to fly. If previous pests migrate through the soil, then these can fly to new plants.
4. 4. Mealybugs are representatives of the same family as scale insects. These worms are not worms at all. In size and lifestyle, they are more like aphids. A person who does not understand the biology of invertebrates usually does not see the difference between aphids and a mealybug. However, there are some indirect signs. The accumulation of these small white insects creates the effect white plaque, as if the plant was sprinkled with flour.
5. 5. Whiteflies are small white butterflies. They usually concentrate on the underside of the leaf, since the cover is less solid there.

These butterflies lay their eggs where they feed. Translucent larvae emerge from the eggs, bite into the leaves, move along their surface, leaving a layer of sticky sweet coating. If the concentration of larvae is high, and the leaves are not processed, then the plaque turns from green to black. This is due to the fact that fungi begin to multiply in a sweet environment.

How to deal with adversity?

If you find white dots, brown shields, cobwebs, sticky plaque on the plant, then you can not look for the culprits, because the control measures are the same. They boil down to the following:

• Detected pests can be removed. Wash the plant with the solution laundry soap(72%). You can use special green soap.

In a soapy state, the plant can remain no longer than 24 hours. After that soap scum must be washed off, as soap interferes with gas exchange between the plant and the atmosphere.

Repeat the procedure after 3 days.

• In some cases, soap procedures do not help. Then you have to turn to special preparations. Fitoverm belongs to such means. According to the instructions, it is used to treat indoor plants if they are affected by aphids, mites and thrips.

Using Phytoferm is simple. It is necessary to dissolve the contents of the ampoule in water. Attention should be paid to the toxicity of the drug to humans, so the treatment should be carried out with all precautions and outside the living quarters, as there will be an unpleasant odor.

7 days after the first treatment, the entire procedure must be repeated. This is due to the fact that most pests live in the soil, and this drug does not damage them, so the next generation appears.

After about 30 days, you will understand whether Fitoverm helped or not. If not, then it's time to take more drastic action.

• Preparation "Doctor" (thiamethoxam) in the form of briquettes. Distinctive feature This means is the destruction of pests in the soil. To do this, briquettes are introduced into the soil. There they gradually dissolve, killing larvae and adults - aphids, scale insects, scale insects, thrips, whiteflies.
• The entire series of preparations "Commander" has universal properties. They can be sprayed on crops growing in open ground, in pots on the windowsill. These are water-soluble crystals that are effective against aphids, whiteflies, thrips. The concentration of the solution must be selected for specific conditions in accordance with the instructions.
• Some people place the affected flower pot in plastic bag and sprayed inside with dichlorvos, then the bag is tightly closed for several hours.

This method can give its results, but dichlorvos is dangerous for people and can burn the plant, it works for a short time, killing only active insects and mites. The larvae remaining in the soil do not die.

There are many means and methods of pest control. The main thing is prevention. Be careful with soil selection.

Hibiscus diseases occur when the care of the plant is violated, it is improperly grown or infected with pathogenic viruses, fungi, and pests. The article describes in detail the problems of hibiscus cultivation, its diseases and methods of their treatment.

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 diseases hibiscus can occur due to such phenomena:

• Stay in a hot, dry area.
• Lack of spraying, especially in summer time.
• Being under the wind, draft, under direct sunlight.
• Dustiness, contamination of hibiscus.
• Excessive watering, which led to rotting of the roots.
• Watering Chinese rose bad water(not settled, containing mass 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.

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:

1. Yellowing of the leaves - pest infestation, plant root diseases, leaf chlorosis, poor indoor air humidification.
2. Falling hibiscus leaves low humidity, lack of spraying, a sharp change in lighting, drafts, other types of stress for the flower.
3. Yellowing, coupled with falling leaves - waterlogging of the root system in winter, stress, low humidity in the room.
4. Twisting the leaves into tubules is the defeat of aphids or some other pests.
5. Withering of the tips of the leaves - lack of nitrogen, phosphorus, other nutrients, the complete absence of complementary foods hibiscus.
6. 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.
7. Dropping leaves and buds by a plant - no the right amount potassium in the soil, leaf damage by midge gall midge, heat 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, Thunder-2, Domotsvet, Cytovit, 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:

1. 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.
2. 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.
3. 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.
4. Worms. They manifest themselves as waxy white secretions on the cuttings, in the axils of the leaves.
5. Shields, false shields. After their colonization, brown tubercles are observed on the stems.
6. 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, processing helps well. soapy water.
• 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 pests. A healthy hibiscus will bloom for a long time and delight its owner.

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 over their entire surface. In addition to the whitefly, other hibiscus pests threaten the plant: aphids, gall midges and spider mites.

spider mite

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. It's not about various types rot when the plant has rotted 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 Sun rays A simple change of scenery will suffice. 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.

Foreword

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.

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 errors in care:

• 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 Bad quality(containing a lot of harmful 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 various diseases in it. If this plant is provided with favorable conditions, or at least not injure it 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.

In most cases, the first signs of a 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:

1. Turned yellow - the plant is infected with pests ( spider mite or aphids), its roots turn white, leaf chlorosis or the room is not enough wet air.
2. 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.
3. Fall off - insufficiently humid air in the room, stress, a sharp change in the intensity of lighting or drafts.
4. Wither at the tips - the plant lacks phosphorus and nitrogen, and also, most likely, some other nutrients.
5. Twisted into a tube - pest damage, most likely aphids.
6. 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).
7. 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 disadvantages 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 are in improper care, then we eliminate the errors. And how to deal with other causes will be discussed later.

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 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 intensity of lighting 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. Upper leaves may have watery edges and separate sections acquire a pale green or light yellow hue. 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 causes the plant to die separate parts and then his 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.

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 it gets into the soil less water, and it did 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 length of time the plants stay in bright light, and only after full adaptation to him 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:

1. We cut off all the affected (dried) fragments of the plant, while slightly capturing its healthy parts.
2. 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).
3. 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 on initial stage failed to cure vascular wilt, and 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 blue vitriol 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.

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 for it). appropriate place from which it is relatively long time does not need to be transferred). 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 minor changes in 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 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.

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 is 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 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.

Whiteflies. They usually hide on the underside of the leaves, where you can find their adults and pale yellow larvae (shown in the photo). characteristic feature defeat of the plant by the whitefly - 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 peddler 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.

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.

There are several diseases that affect different parts of the flower:

Differences from pest damage

Possible consequences

The consequences of diseases for the Chinese rose directly depend on which disease struck and at what stage the lesion. If the disease was detected on time, then the plant can still be saved by taking urgent measures.. The main consequences of the diseases remain:

• loss of decorativeness;
• growth retardation;
• death.

When is resuscitation possible and when not?

Resuscitation for a plant is an emergency measure that will save the flower from death. It makes sense to hold such events if the state of the rose is not running. Then stressful situation will allow him to activate the processes of growth and development. If the disease is running, then resuscitation is useless.

Instructions on what to do at home

If the Chinese rose dries up, then the first thing to do is to normalize its watering. From spring to autumn, the flower needs moisture. Use distilled water for irrigation room temperature.

The next reason for the drying of the plant are mites.. To combat them, you can try the following drugs:

These products are toxic, so be sure to open a window, wear gloves and a respirator before using them.

Processing looks like this:

1. To begin with, carefully water the flower, and treat the stems and leaves with soapy water.
2. Now you can proceed to spraying, and use several drugs in turn.
3. Re-treatment is carried out after 7-10 days.

As for folk remedies, they are effective only at an early stage of infection. Popular recipes:

• Onion infusion. For 20 g of husk 1 liter of water. Infuse for 5 days, spray the bush with infusion, wipe the leaves and branches.
• Infusion of garlic. Pour 2 large and chopped heads of garlic, pour 1 liter of water and leave for 5 days. Before use, dilute the infusion with water in equal proportions and spray the bush.

Hibiscus withers

If the plant began to wither, then it can be very difficult to cure it. But you can try if you use the following recommendations:

1. Remove all dried parts of the plant, lightly affecting its healthy fragments.
2. Treat the rose with antifungal drugs: Fundazol, Topsin, Dezavid. You can use folk remedy- Trichopol solution (2 tablets per 1 liter of water).
3. For additional stimulation of the rose, treat with such preparations: Epin, Zircon, Domotsvet.

IMPORTANT: If at the initial stage it was not possible to cure the hibiscus, and it still fades, then you will have to get rid of it.

Curling of azalea leaves occurs as a result of the activity of the whitefly. To combat it, drugs are used:

When working with drugs, use gloves and ventilate the room well!

leaves fall

1. Shchitovka. Leaves are mechanically cleaned with a soap sponge. Next, process 0.155 Actellik solution (1-2 ml per 1 liter of water).
2. Aphid. To combat it, spraying with Dirris, Fitoverm, Decis, Aktellik is used. If the lesion is severe, then repeat the treatment after 10 days.

turns yellow

To prevent the appearance of yellowness on the leaves or get rid of it, you will need to follow the following recommendations:

• Watering should be moderate, avoid standing water.
• No draft.
• Timely subcortex.
• No direct sunlight.
• Leaf processing by special means for prevention.

ADVICE: In case of damage of viral origin, it is pointless to carry out treatment, remove the diseased flower immediately so that the rest of the plants do not become infected.

Does not bloom

If the hibiscus does not bloom in any way, it needs to be stimulated:

1. To stimulate flowering, it is necessary to cut off old branches in a timely manner.
2. Replace old soil with new.
3. Set the plant in a sunny location.
4. Do not forget to apply fertilizer to stimulate new shoots and buds. But nitrogen-containing compounds to reduce.

Watch the video about the reasons for the lack of flowering of hibiscus and how to fix it:

If the Chinese rose is on the verge of death, then urgent resuscitation is necessary. It includes the following procedure:

At high humidity and good lighting, dormant buds will wake up and begin to develop root system. Zircon treatment should be carried out every day, as it restores turgor.

Prevention

To prevent the development of a recurrent disease, the following preventive measures must be taken:

• Temperature indicators should not go beyond the norm - 18-22 degrees Celsius. Drying and waterlogging are unacceptable.
• Timely pest control. It is they who lead to deformation of the leaves and the development of diseases. For processing, use Peretrum, Aktofit.
• It is best to use mineral complex fertilizers to regularly apply nutrient compositions.
• The air in the room should be moderately humid, but not dry.

Care

1. Temperature. Chinese rose is a heat-loving plant. In spring and summer, temperatures will be 25 degrees Celsius, and in winter - 15-20 degrees. If in winter the temperature is below 10 degrees, then the leaves will fall off. In the summer, put the flower on the balcony, protecting it from rain and wind.
2. Lighting. Hibiscus is a photophilous culture. For him, diffused light is important. If direct sunlight hits the flower in summer, then this is fraught with the development of a burn. Grow the plant on east or west windows.
3. Watering. In spring and summer, the Chinese rose needs abundant watering. Use settled and room temperature water. Avoid over-wetting. In winter, watering is moderate. Before the next irrigation, wait until the soil is completely dry. Be sure to provide good drainage.
4. Air humidity. In the summer, hibiscus needs high humidity. It is useful for him to carry out frequent spraying. Only water should not fall on the flowers, otherwise they may fall off. In winter, less moisture is required. But carried there central heating, then spraying is carried out every other day.
5. top dressing. From spring to autumn, apply complex nutrient formulations intended for flowering houseplants. Do this once every 2 weeks. Starting in August, reduce nitrogen-containing top dressing.
6. pruning. Prune China rose heavily every spring. This will allow the bush to acquire a compact form with a large number of buds. If the plant begins to stretch strongly, then cut it off during the growth period. Thanks to pruning, the flower can take the form of a shrub or tree.

Conclusion

Chinese rose, like others ornamental crops affected by certain diseases. The main task of the grower is to detect the problem in time, understand the cause of its development and proceed to effective treatment at home. Only quick and coordinated actions will help save both the flower itself and its decorative appearance.