Why do the leaves of a Chinese rose or hibiscus disease turn yellow

The Chinese rose is a very beautiful houseplant. But in order for the flower to be healthy and bloom profusely, one must not forget to take care of it. If symptoms such as yellowing and falling foliage appear, an urgent need to look for the cause and eliminate it.

Why do the leaves of the Chinese rose turn yellow - hibiscus diseases and their treatment

The birthplace of hibiscus is China and Indonesia. There it grows like a wild plant. In colder regions, the Chinese rose is grown as a home flower. Hibiscus diseases mainly arise from improper care or lack of it. If the leaves began to turn yellow, fall off, spots or white bloom appeared, then the hibiscus is sick with something.

Chinese rose

White bloom on hibiscus leaves

White bloom on the leaf plate is a characteristic symptom of a fungal disease, powdery mildew. The disease spreads very quickly. The foliage is not only covered with a white bloom, but also begins to turn yellow, curl and fall off.

In the early stages of the disease, all the affected parts of the flower are cut off, the bush itself is sprayed with a solution of antibiotics. Soda treatment is also effective.

Hibiscus leaves turn yellow and fall off, what should I do? A good remedy is copper sulfate and a soap solution. To prepare it you need:

1. Take 30 g of copper sulfate, 60 g of laundry soap and 500 ml of warm water.
2. Dissolve soap in water and add copper sulfate.
3. Mix the solution thoroughly.
4. Cut off all damaged areas of the plant.
5. Spray the flower.
6. After 7 days, repeat the treatment.

For full recovery of hibiscus, 2-3 treatments are required.

White bloom on hibiscus

From fungicides for powdery mildew, Fitosporin-M, Planriz, Gamair are used. The drugs are used according to the instructions on the package.

Why does hibiscus shed its unblown buds

The reasons for the dropping of buds include a low percentage of humidity in the room, improper watering, and lack of sunlight. Also, the problem may be a lack or excess of nutrients.

What to do if unopened buds fall off a flower:

• Place the hibiscus in a place where there will be diffused light.
• Establish watering. The soil should not be allowed to dry out. For irrigation, you can use warm, settled or purchased water. In the summer, you can additionally spray the plant.
• A large number of buds also negatively affect flowering. Because of this, even large inflorescences do not have time to bloom. During budding, you need to pick off small buds and leave only the largest ones.

Another important factor is the application of fertilizers to the soil. For 3 weeks, you need to feed the flower with organic fertilizers. If he began to grow actively and the buds do not fall off anymore, then you can stop feeding. You can use manure, mullein, wood ash, bone meal.

Hibiscus chlorosis - treatment

Chlorosis is of two types - infectious and non-infectious. Non-infectious leaf chlorosis occurs due to a lack of certain trace elements in the soil. These include zinc, magnesium, potassium, nitrogen, and iron.

Signs of non-infectious chlorosis:

• The shoots become thin.
• The foliage takes on a light yellow-green hue.
• The buds are no longer tied.
• Spots appear on the leaf plate.
• Leaves fall en masse.

Chlorosis is infectious as a result of fungal infection of the plant. This disease is accompanied by the same symptoms.

Treatment for both types of the disease consists in applying complex mineral fertilizers to the soil. For example, a good dressing for roses "Mister Color" or "Plato K".

Chlorosis of leaves

Hibiscus pests

Not only violations of the rules of care and illness lead to the fall of the foliage of the plant. Another serious problem is the appearance of pests. If treatment is not started on time, hibiscus will not only grow poorly, but may also wither completely.

Aphids on hibiscus - how to process

One of the most common pests is aphids. Before you find out why the leaves of hibiscus turn yellow, you need to carefully examine it. It is possible that these little green bugs suck all the juices out of the hibiscus. Aphids can be seen on leaves and buds. It does not exist on the branches.

The reasons for the appearance of aphids in the house:

• The insect can enter through open windows in summer.
• On a person's clothes.
• On pet hair.
• Through other plants, which are taken out into the street or on the balcony in the summer, and transferred back to the house in the fall.

What to do if aphids appear on hibiscus:

• The use of biologics Fitoverm and Vertimek is recommended. Bushes are sprayed with these preparations as aphids appear. An interval of 7-10 days must be maintained between treatments.
• From fungicides with yellow foliage, Bison, Aktara, Insektor are used.
• The safest remedy is to put fragrant pelargonium next to it, if there is such a plant in the house. Aphids cannot stand the smell of this flower. The disadvantage of this method is that for some varieties of aphids, pelargonium is a fodder plant.
• From folk methods, you can try soapy water treatment. Dissolve 70 g of laundry soap in 200 ml. Then you need to wipe all the leaves and branches. For greater effect, the bush is then sprayed with the same solution.
• Infusion of tobacco also repels the pest. To prepare it, you need to take 100 grams of dried tobacco. Pour 1 liter of water and put on low heat. After boiling, cook for 30 minutes. When the broth is ready to strain it, cool it, and then you can use it for spraying.
• Infusion of marigolds. Dried inflorescences are used to prepare the infusion. Pour 100 grams of flowers into 1 liter of water. Put on fire, bring to a boil and boil for another 30 minutes. Then strain the infusion, cool, and only after that you can start using it.

Scabbard on hibiscus

Another dangerous pest, due to which the leaves begin to wither, is the scale insect. The insect's danger lies in the fact that adults and larvae feed on plant sap. Females stick tightly to the leaf surface to protect larvae and eggs. Yellow or brown spots appear in these places. Gradually, all the leaves can fall off if the pest is not removed. Later, the infected plant also sheds buds.

Determining the appearance of scale insects is quite simple. Small brown bumps appear on the leaves. Most often they are located along the veins.

What to do if leaves begin to fall off because of the scabbard:

• You need to remove the infected hibiscus to another room where there will be no plants. Then you can start treatment.
• You can collect insects by hand. To do this, you need to make a soapy solution and wipe each leaf on both sides and all the stems.
• After mechanical cleaning, you can start treating with insecticides Bankol, Inta-Vir, Aktellik, Mospilan. Insecticides are used according to the instructions on the package.
• Additionally, you can spray the hibiscus with alcohol.

Shield

If a cobweb has appeared on the foliage, then a spider mite has wound up on the hibiscus. Insecticides do not help against ticks. In this case, the hibiscus must be sprayed with acaricidal preparations.

Black aphid on hibiscus

Leaves can turn yellow due to black aphids. Unlike green aphids, this species is much more difficult to breed.

Why do the leaves of a Chinese rose turn yellow and fall, what to do:

• In the process of vital activity, aphids suck juices from leaves and stems.
• Often ants appear along with aphids, due to which the foliage can begin to turn yellow and fall off.
• To destroy the insect, you can use the chemicals Aktara, Fitosporin-M, Insector, Fitoverm.
• Folk remedies are also effective.

Aphids on a plant

The foliage is sprayed with soapy water, onion peel decoction or garlic infusion. The number of treatments depends on how badly the plant is affected by the pests. Before processing, it is worth rinsing the Chinese rose under a warm shower.

Hibiscus is a very capricious houseplant native to the subtropics. So that it grows healthy, does not get sick and blooms profusely, you need to provide the indoor flower with all the conditions necessary for this. If the leaves of a Chinese rose began to turn yellow and fall off, it means that an urgent need to look for the cause and eliminate it so that the flower does not die.