How to control powdery mildew in cantaloupe planting?

How to control powdery mildew in hami melon planting? What harm does powdery mildew have to hami melon? Also please have experience to help introduce the net friend powdery mildew for hami melon planting main disease, widespread distribution, widespread occurrence, protected land, open field have occurred, seriously affect hami melon yield and quality. Therefore, the planting network sorted out the harm and prevention methods of powdery mildew in Hami melon planting process, listed in detail below for netizens 'reference. Powdery mildew harm to Hami melon: Powdery mildew can occur throughout the growth period of Hami melon, and can infect leaves, petioles and stems. At the beginning of powdery mildew disease, white spots were formed on the leaves, and many spots merged into large irregular spots. Later, the leaves were covered with powdery mildew, namely conidia and conidia. Powdery mildew can cause cantaloupe diseased leaves to gradually senescence and die, sometimes producing black dots on necrotic spots, that is, sporangia. Petiole and stem vine infected, the surface also produces white powdery mildew spots, serious when the disease spots densely, tissue premature aging, death. Powdery mildew likes temperature and humidity, tolerance to drought, high temperature and humidity alternate is conducive to the occurrence and development of disease. The optimum temperature is 20-25℃, the relative humidity is 25%-85%. In the middle and later stages of growth, the plant grew weak and the disease was serious. Hami melon planting control powdery mildew method: method one, select suitable varieties and disease-resistant varieties. Method 2: Adopt high ridge planting, reasonable dense planting, pay attention to ventilation and ventilation; apply fertilizer scientifically, apply sufficient base fertilizer during planting, increase phosphorus and potassium fertilizer, avoid late defertilization, cultivate strong seedlings; timely irrigate, pay attention to the combination of irrigation and drainage, prevent excessive humidity in the field; timely prune branches and fork, and remove diseased plants in time. Method 3: Sulfur fumigator can be used for regular fumigation prevention. Method 4. At the early stage of disease, 2% agricultural antibiotic 120 aqueous solution, 2% Wuyimycin aqueous solution 200-300 times solution, 43% Junke suspension 8000 times solution, 10% Shigao moisture dispersible granule 8000 times solution, 40% Fuxing emulsifiable concentrate 8000 times solution, 25% Breton wettable powder 2500 times solution, or 30% Tefulin wettable powder 4000 times solution were selected. Or 25% triadimefon wettable powder 1000-1500 times solution spray. 5% chlorothalonil dust or 5% garinone dust or 15kg/hm2 dust spray of the above mentioned agents were selected in the early stage of planting disease in protected land, and the control effect was ideal. Hami melon split melon control method Hami melon root knot nematode control method