Pumpkin powdery mildew mainly affects leaves, petioles and stems. It is the most common and serious disease in pumpkins. The control measures are as follows:
1. Choose disease-resistant varieties according to local conditions
At present, more Japanese scented pumpkins, squash squash and orange squash have certain disease resistance, but they must be purified and rejuvenated, and use disease-free seedlings.
2. Seed disinfection
Soak the seeds in the sun for 1-2 days before sowing to kill the epidermis and increase the germination potential; soak for 30 minutes with 50 °C-55 °C warm water, reduce the temperature to 30 °C and continue soaking for 8-10 hours, then put Disinfect with 1% potassium permanganate solution for 20-30 minutes, rinse for 48-72 hours at 28 °C-30 °C, and sown when exposed. Other pesticide fungicides or professional seed dressings can also be used for soaking or seed dressing.
3. Strengthen management
Reasonable close planting, ditching and drainage, timely removal of diseased leaves and old leaves, strengthening ventilation and light transmission, in order to enhance plant growth, increase application of phosphorus and potassium fertilizer, and improve disease resistance.
4. Chemical control
In the early stage of the disease, timely spraying and prevention, the agent can choose 50% Kaiser water dispersible granules 1200 times solution, or 50% Tsuibei dry suspension agent 3 0003 times solution, or 40% Fuxing emulsifiable concentrate 4000 times solution, or 10% High water dispersible granules 1500 times solution, or 30% Teflon WP 1500 times solution, or 62.25% Xiansheng WP 600 times solution, or 25% tebuconazole 1500 times solution, or 75% chlorothalonil The wettable powder 600 times liquid, or 2% agricultural anti-120 water agent 200 times liquid for prevention and control, every 7-10 days, once every 2 - 3 times, pay attention to alternate use. The protected area is also smoked, 120 grams of sulfur per 50 cubic meters, 500 grams of sawdust and mix well, and put a few places; or 45% of chlorothalonil fumigant for fumigation per acre, start fumigation overnight in the evening, The next morning, the shed was ventilated.
Pumpkin is the most affected melon in melon powdery mildew, so we must do a good job in disease prevention and control.
More pesticide knowledge , please pay attention to China Pesticide Network
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