How to use medicine to control muskmelon powdery mildew

1. Disease resistant varieties were selected. There are significant differences in disease resistance among different muskmelon varieties, so the selection of disease-resistant varieties is the key to control the occurrence of the disease. two。 Clean the countryside. Weeds and residues should be removed in time after harvest, weeds should be weeded in time during the growing period of melons, diseased leaves should be removed, and weeds, residues and diseased leaves should be brought out of the field and burned. 3. Scientific management to enhance plant disease resistance. Apply sufficient base fertilizer, especially re-apply rotten organic fertilizer, deeply turn fine rake, prevent plant overgrowth and premature senescence, arrange branches in time, strengthen ventilation and light, pay attention to topdressing phosphorus and potassium fertilizer in the middle of growth, and make good use of foliar fertilizer to cultivate strong branches and enhance population disease resistance. 4. Scientific irrigation. To create environmental conditions suitable for melon growth and not conducive to the occurrence and development of powdery mildew. Irrigation should grasp four principles: no sunny day in cloudy days, no morning water in the afternoon, no big water, no small water, no open water and dark water (that is, dark irrigation under plastic film). 5. Chemical control. Choose 15% Fenru Ning wettable powder 1000 times liquid, or 40% Dakoning suspension 800 times 1000 times liquid, or 40% Fuxing EC 6000 times liquid, or 10% Shigao water dispersible granules 2000 times liquid, or 30% Teflin wettable powder 5000 times liquid, or 50% methyl topiramate wettable powder 1000 times liquid alternately, spray once in 7 days and 2 times in a row. Melons are forbidden to use medicine 7 days before harvest in order to harvest safely.