The main symptoms of pumpkin blight : the stem vines are heavier, the leaves and fruits are less ill, the adult stage is seriously damaged, and the seedling stage is lighter. At the beginning of the disease, the base of the stem was dark green water stain, and the diseased part gradually contracted soft rot, which was dark brown. The leaves of the diseased part were wilting. Soon the whole plant died and the vascular bundle of the diseased plant did not change color. The leaves are damaged to produce round or irregular water-stained large lesions, which have a fast development speed, no obvious edges, and are dry and dry when dry, and the leaves are brittle and easy to break. The melon is damaged by soft rot, and when wet, the surface grows long and sparse white mold. Pathogenesis: The bacteria are overwintering in the soil, and the seeds are not contaminated. The pathogen is caused by rain splash or irrigation water to the base of the stem or near the surface of the fruit, causing disease. The temperature is 25 ° C - 30 ° C, the relative humidity in the air is more than 80%. After a rainy or rainy day, the weather suddenly turns fine, the temperature rises rapidly, and the disease is prone to prevalence. Water accumulated in the field, the planting density is large, and the ventilation and light transmission in the field is not good. Control method 1. Choose a field plant that has not been planted with cucurbit crops for more than 5 years to avoid continuous cropping. 2, select resistant varieties, use sorghum cultivation, avoid water accumulation in the field, do not water at noon high temperature, do not allow irrigation or string irrigation; after the fruit is expanded, take straw and other melons to avoid direct contact with the ground. 3, the use of fungicide 70% epidemic spirit (ethyl phosphate aluminum) wettable powder irrigation or spraying, the effect of prevention and control of disease is better. Can also be used 58% metalaxyl manganese zinc wettable powder 500 times solution, or 75% chlorothalonil wettable powder 600 times liquid root irrigation, each plant irrigation root 250-300 ml, every 7-10 days once, continuous irrigation 3 - 4 times. Bathroom Basin Faucet,Table Top Wash Basin Taps,Golden Tap For Wash Basin,Vanity Basin Taps Heshan Janno Kitchen and Bath Technology Co.,Ltd , https://www.janno-ks.com