How to prevent and cure squash cotton rot

Disease characteristics: zucchini cotton rot is mainly harmful to fruits, sometimes to leaves, stems and other parts. The leaf is damaged, the primary dark green, round into irregular water-immersed disease spot, when the humidity is high, it seems to be scalded by boiling water. At the beginning of the disease, the fruit showed an oval, water-immersed dark green spot. Under the condition of air drying, the disease spot becomes brown, slightly sunken, the flesh under the skin becomes rotten, and the surface produces a white mildew layer. Incidence regularity: zucchini cotton rot is caused by fungal infection. The pathogen overwintered in the soil, germinated under suitable conditions, invaded the plant through the stem, leaf and fruit epidermis, spread with the help of Rain Water or irrigation water, and invaded the fruit. Bacteria are mainly distributed in the surface soil layer, after rain or high humidity, the bacteria increase rapidly, low soil temperature and high humidity are conducive to the disease. Prevention and control methods: (1) adopt high border cultivation, reasonable watering, avoid flood irrigation, timely drainage after heavy rain, melon can be cushioned after melon to prevent dampness and disease. (2) avoid partial application of nitrogen fertilizer and increase potassium fertilizer appropriately. Increase the antibiotics in the soil, inhibit the growth of pathogens, reduce the damage, and remove the diseased melons in time. (3) Pharmaceutical control: at the initial stage of the disease, choose 50% carbendazim wettable powder 800x liquid, or 10% Polaroid wettable powder 800~l000 double liquid spray.