The causes of eggplant yellow leaf disease may be improper watering, too strong illumination, too much fertilization, soil discomfort, pests and diseases, etc. , causing eggplant leaves to turn yellow.

1. fertilizer damage: fertilizer damage mostly occurs on cloudy days or after clearing up, and a large number of immature farmyard manure is used as base fertilizer or irrigation fertilizer is improperly used. Ammonia gas is produced during the growth of eggplant. When ammonia gas accumulates to a certain extent, it will be harmful to eggplant. If the air is not released in time, it may cause ammonia poisoning. When selecting base fertilizer and flushing fertilizer, we should not only pursue quick effect, but also use a large number of fertilizers with high nitrogen content. We can use decomposed farmyard manure or biological manure, which can not only increase the number of beneficial bacteria in the soil, but also effectively increase the ground temperature.

2. Phytotoxicity: Appropriate dosage must be selected according to nature, weather and plant growth. Attention should be paid to the prevention and control of gray mold and rotten eggplant: Xerox, pyrimethanil and other pesticides have good effects, but the concentration must be controlled well. Not suitable for taking medicine in the morning and evening. At this time, the stomatal opening and closing degree of plants is small, and the efficacy is reduced. Taking medicine at night will increase air humidity and increase the incidence of diseases. It is best to spray at around 10 in the morning. In addition, for vegetable farmers who grow round eggplant, it is best not to use pyrimethanil to control gray mold.

3. Element deficiency: magnesium deficiency and iron deficiency will cause yellow leaves of eggplant, and timely supplement of fertilizer is the key.

Treatment of eggplant yellow leaf disease;

1, fertilizer damage: after the soil fertilizer damage of eggplant occurs, it is necessary to irrigate in time, keep a certain temperature, and spray foliar fertilizer mixed with potassium dihydrogen phosphate on the leaves to make the plants recover as soon as possible. If the root system is damaged, it can be irrigated with rooting agent and applied with rooting fertilizer.

2. Occurrence of phytotoxicity: Phytotoxicity caused by spraying foliar fertilizer, water or antidote on eggplant can be alleviated. Increasing the indoor temperature in the shed at night can promote and nourish the roots.

3. Element deficiency: Eggplant suffers from yellow leaf disease due to magnesium deficiency and iron deficiency. Eggplant can be added with various elements and slowly recovered.

Special drugs for controlling eggplant yellow leaf disease;

When eggplant suffers from yellow leaf disease, it can be watered with EM live bacteria, Fengshou 1 and cytokinin to relieve symptoms and restore growth.

Preventive measures of eggplant yellow leaf disease;

To prevent eggplant yellow leaf disease, you can choose Sukeling, chlorpheniramine and Master Hou, mix them with water and spray them. Generally, spraying 1 time every 7 days and spraying for three times in a row can alleviate the symptoms of yellow leaf disease.