Puyang Degren Medical Equipment Co., Ltd. , https://www.degrenyuwei.com
What are the common diseases of onion?
Common onion diseases include downy mildew, purple spot, gray mold and anthrax. Control methods: The plant protection policy of “prevention-oriented, comprehensive prevention and control†should be adopted, and pollution prevention and control should be carried out on the basis of comprehensive agricultural control. 1. Select disease-resistant varieties, implement rotation, increase organic fertilizer, phosphorus and potassium fertilizers and trace fertilizers, deepen the soil for more than 40 days, improve the soil, try to eliminate and reduce residual pathogens in the soil, and reduce the source of infection. 2. Strengthen the management of fertilizer and water, with particular attention to timely spraying Tianda 2116 to improve the disease resistance and adaptability of plants. 3.Scientific use: Downy mildew, in the early stage of disease, use 80% ADP 500 times solution +64% antiviral 500 times solution or 70% metalaxyl manganese or EDHP 500 times, or 72% DuPont Ke Lu 600 to 800 times the liquid, or 72.2% Prec 700 times, or 800 times the green copper milk, or 800 times Trickle, 600 times or 600 times, or 75% chlorothalonil 800 times Liquid and other prevention. Purple spot, with 78% Cobo WP 500 times, or 41.5% fluconazole 1500 times, or 75% chlorothalonil wettable powder 600 times, or 64% antiviral WP 500 Diluent, or 50% of iprodione (Phaiou) WP 1000 times and other control. Botrytis cinerea, at the early stage of disease, was treated with 25% Prochloraz EC 1000 times, or Shijiale Suspension 1200-fold, or Sickoline 3000-times, or 50% Prataxam WP 1500-fold. Anthracnose, at the beginning of the disease, use 10% Shihai water dispersible granules 1500~2000 times solution, or use 25% prochloraz (make 100g) EC 1000 times, or 50% anthrax Fumei wettable powder 500~800 times Liquid and other prevention. All the above-mentioned disease-prevention liquids need to be mixed with 800 times neutral soap powder and alternately spray 600 times Tianda 2116 alternately, once every 7-10 days, and continuously spray 2 or 3 times. Can achieve good control effect.