How to deal with the yellow leaves of eggplant

The yellow leaves of eggplant are mainly caused by the following two reasons: one is fertilizer damage. This harm often occurs on cloudy days or after the weather clears up. Mainly due to the use of a large number of immature farm manure as base fertilizer or improper application of flushing fertilizer, resulting in excessive accumulation of ammonia, coupled with the lack of timely release in the greenhouse, resulting in ammonia poisoning. Second, drug damage. Mainly overdose. Therefore, in the prevention and control of eggplant diseases and insect pests, farmers must choose the appropriate dosage according to the nature of the pesticide, weather and plant growth. Especially in the near future, when using Shijiale, pyrimidine and other agents to control Botrytis cinerea, the concentration must be strictly controlled. In addition, it is not suitable to use medicine in the morning and evening, because the stomatal opening and closing degree of the plant is small, which can not only reduce the efficacy, but also increase the air humidity and increase the occurrence of the disease. In the current season, it should be sprayed around 10:00 in the morning. Experts warn that for planting round eggplant, try not to use pyrimidine to prevent and cure Botrytis cinerea. For the plants with fertilizer damage (soil fertilizer damage, air damage), it is necessary to grasp the right time and timely watering so as to restore the physiological functions of the plants as soon as possible. In addition, it is necessary to maintain a certain temperature in the shed. Foliar spraying foliar fertilizer such as Fengshou No.1 and Xianu had better be mixed with potassium dihydrogen phosphate. If the root system of the plant is damaged, we should pay attention to promoting the root and raising the root. We can irrigate the root with rooting agent or apply rooting fertilizer (humic acid, microbial fertilizer). For plants with drug damage, Fengshou No.1 or other foliar fertilizer can be sprayed on the leaves. If found in time, foliar spraying or watering can alleviate the harm. At the same time, it is also necessary to increase the temperature of the greenhouse, especially at night, in order to promote root cultivation. In addition to fertilizer damage, drug damage, element deficiency can also cause yellow leaves of eggplant, such as magnesium deficiency, iron and so on. The middle and lower leaves of magnesium-deficient eggplant turn yellow and develop from the bottom to the top, and some develop along the veins with obvious symptoms. Under the condition that the soil is acidic, fertile and wet, eggplant is prone to iron deficiency, and the top young leaves of iron deficient eggplant are yellowed.