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Hibiscus is a popular plant that can give its owner a cause for concern. In general, hibiscus can be attributed to indoor plants that are not picky in content and are quite resistant to pests.
If the flower is still overcome by ailments, saving it with the help of special methods is a completely feasible task for any grower.
A stunted appearance, spots on the leaves indicate that the hibiscus is suffering from diseases. In this article, we will consider the main types of hibicus leaf diseases, analyze each type of disease, and also learn how to properly treat them.
What do the diseases look like in the photo and what to do?
Sometimes, hibiscus can release drops on its own and this is not a pathology, but the localization of these secretions should be at the junction of the petiole with the leaf.
In other cases, the appearance of a sticky plaque indicates that the plant has been damaged by pests: aphids or scale insects. And if aphids can be seen with the naked eye, then the scabbard betrays its presence only with sticky secretions.
Important! An additional symptom of the appearance of these sap-sucking parasites on hibiscus is yellowing and leaf fall.
To help the flower, you need to give it a shower. In this case, the soil must be covered with a waterproof film so that washed off pests do not get into it. Then the hibiscus must be dried and treated with an insecticidal preparation, according to the instructions.
The appearance of small, yellow, watery spots indicates the defeat of the hibiscus by bacterial spotting. The shape of the spots is irregularly angular, and along their edge there is a light green or yellow border. Bacteria cause this ailment and treatment should be carried out with the use of antifungal drugs.
Also, manifestations of bacterial lesions can be so-called bacterial burns. The spots in these cases are quite extensive, shapeless, and black. Treatment is also carried out with antifungal drugs, untimely assistance to the hibiscus will lead to its death.
The leaf plates have fallen
The reason for this symptom may be:
- Insufficient, or, on the contrary, excessive watering.
- The air temperature is too high or too low.
- Lack of lighting.
The improvement of hibiscus, if the ailment arose due to the above reasons, consists in adjusting the conditions of detention.
Also hibiscus can shed leaves due to spider mite damage, or due to excess nutrient content in the soil. In the first case, insecticide treatment will be required, in the second it is necessary to adjust the composition of the soil.
The plant is affected by mealybug or powdery mildew:
- In the first case, it is a pest.
- In the second, a fungal disease.
The waste products of the mealybug visually look like lumps of cotton wool on the leaves and stems, treatment consists in washing the plant and treating it with insecticidal preparations.
Antifungal drugs are used to treat powdery mildew, which creates the visual effect of flour sprinkling on the leaves.
A disease with this symptom is called dropsy. Black dots appear from a combination of waterlogging and cold. This defect can be corrected by restoring conditions acceptable for hibiscus.
Leaf plates drooped
If the plant has dropped leaves, it either lacks moisture, or it is very waterlogged. Sometimes this symptom can appear at a high temperature. Adjustment of conditions of detention will help to save hibiscus from malaise.
This is a disease in which the process of chlorophyll formation is disrupted in a plant and the activity of photosynthesis decreases. The main symptoms of the disease are yellowing and leaf fall.
Chlorosis can be of two types - infectious and non-infectious. The most common form is non-infectious. The reason for the occurrence lies in the wrong composition of the soil - excess or insufficient amount of nitrogen, potassium, iron and magnesium.
The symptoms of the disease are as follows:
- with a lack of iron, the leaves turn yellow and fall;
- potassium deficiency causes thinning of branches, lack of flowering or pale color of flowers;
- lack of magnesium or nitrogen appears as yellow or white spots on the leaves.
The causative agents of infectious chlorosis are fungal microorganisms and viruses. Symptoms accompanying the disease:
- yellowing and falling of leaves;
- general weakness of the plant;
- lack of flowering.
How to treat chlorosis? For the treatment of non-infectious chlorosis, it is necessary to bring the composition of the soil to an optimal state for hibiscus.
Infectious chlorosis is best prevented by keeping the flower out of contact with diseased plants.
As for the treatment, the optimal solution would be to transplant the pre-washed plant into a new, disinfected container with fresh soil. Also special drugs designed to treat infections will be effective.
It is observed when hibiscus is affected by fungi of the genus Verticillus, or Fusarium. After the leaves curl up, they die off and only the top remains of the plant. After the defeat of all leaves, a rapid drying of the trunk and death of the flower follow. For treatment, you must use antifungal drugs.
Read more about diseases and pests of hibiscus here.
The timely noticed ailment of the pet, hibiscus, will help prevent critical conditions and prevent bitter disappointment from the death of the flower.