Soybean blight, also known as bud blight, is a type of soybean virus disease that has a large impact on yield. Due to the different time of onset, the loss is between 25% and 100%. The main prevention and control method of the disease is:
1. Strengthen quarantine, eliminate seeding of diseased seeds, and prevent disease from spreading.
2. Breeding disease-resistant varieties, using non-toxic seeds, sowing soybean seed coating before sowing seeds.
3. Soybeans and high-pole crops shall be concurrently handled, and early sowing should be conducted in an appropriate period to remove weeds in the field in time and remove the diseased plants in the plots where the plots occur.
4, pharmaceutical control. Due to the longer onset time of soybean blight, chemical control is more difficult, so prevention is advocated. Prevention and control of aphids can reduce the damage of virus diseases, spraying 2.5% of emulsion oil 5000 times solution or 40% of omethoate 2000 times during the seedling stage; 70% of mancozeb WP can be used in the early stage of soybean disease. Liquid, 75% chlorothalonil wettable powder 600 times liquid, 64% antivirus WP wet spray 600 times spray control.
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