Eggplant Blight Disease, also known as "rotten eggplant," is caused mainly by the eggplant phytophthora. The pathogenic bacteria overwintered with the crop's diseased bodies in the soil, and then spread water to the eggplant on the ground in the next year by rainwater. The disease then spreads through wind and rain. During the period from July to August in the full fruit period of eggplant, hot and rainy conditions are conducive to disease, especially continuous rainy weather and hot weather, the onset is early and heavy. Low-lying, waterlogged fields, high density planting, poor ventilation, and severe disease. Control methods: (1) Selection of disease-resistant varieties. In general, garden eggplant is more resistant to disease. (2) Rotation and change of crops to avoid continuous cropping with solanaceae and melons should be carried out with cruciferous and leguminous crop rotations. (3) In time, the old leaves are destroyed, the conditions for ventilation and light transmission in the fields are improved, and the diseased leaves are cleared in time and taken out of the field. (4) Deep ditch sorghum, timely drainage after heavy rain, fruit ripening timely harvest. (5) In the initial stage of disease prevention and treatment in a timely manner, spraying about once every 7 days, and even spraying 3 to 4 times, focusing on the protection of eggplant when spraying. Pharmacists can use 72% Pyrosinma WP to 800 to 1000 times, 40% to eggplant WP to 1000 times, 20% to eggplant to soft rot to 400 to 500 times, 42% to Spray Suspension 600 times liquid, 72% DuPont Kelu wettable powder 800 times liquid, each pesticide used interchangeably.