Eggplant powdery mildew is one of the common diseases of eggplant, and it occurs in all vegetable areas. In the open field cultivation, the damage can occur when the cultivated land is cultivated, but the cultivation in the protected area is obviously heavier than the open field cultivation. The years of warm, rainy weather during the growing season are severe. When the disease is serious, the front and back sides of the leaves are all covered with white powder. Eggplant powdery mildew mainly harms the leaves. In the early stage of the disease, irregular chlorotic yellow spots appeared on the leaves, and white mustard spots appeared in the corresponding parts of the leaf back. After the number of lesions increased, the white powder became increasingly obvious and white spots appeared. The white powder spots can be connected to each other and spread over the entire leaf surface. In severe cases, the front and back sides of the leaves are covered with white powder, and finally the leaves turn yellow and dry. The most suitable climatic conditions for eggplant powdery mildew are temperature 16-24 ° C, relative humidity 45-75%; when the relative humidity exceeds 95%, the development of disease is inhibited. The susceptible period of eggplant is in the flowering stage. Fields with low topography, poor drainage, poor crop growth, continuous cropping and cultivation, and poorly ventilated and poorly applied nitrogen fertilizers are serious. The year is severe in the years of warm, rainy weather in spring and summer. Control method (1) Agricultural control. Carry out rotation; select resistant varieties; scientific fertilization; reasonable close planting; ventilation, dehumidification; timely removal of disease, old leaves and sick bodies. (2) Chemical control. In the early stage of the onset of the disease, every 7-10 days, continuous prevention and treatment 2-3 times, depending on the development of the disease, the use of fungicide 25% acetaminophen suspension 1000 times liquid spray control effect is good. Dr. State Ethyl Acetate http:// Shangqiu Jinda Tools Co.,Ltd , https://www.jindameasuring.com