1. Agricultural Prevention and Control: In cooperation with non-cruciferous crops, promote the cultivation of small sorghum in the rainy season, clean the pastoral areas, strengthen the management of the cultivator, reduce the sources of pests, and increase plant resistance.
2. Physical control: 20 centimeters and 40 centimeters of yellow plastic sheet are used to trap and kill the aphid and spot dive rope, 30-40 pieces per mu, and change every 10 days.
3, pharmaceutical control
(1) Downy mildew: 40% mildew net 200 times or 64% antivirus 300-400 times or 72% Kelu 600-800 times spray control.
(2) Melasma: spray control with 800-1000 times or 10% 800-1000 times solution of 50% Johnson-Ammonium or 600 times solution of 80% Mancozeb.
(3) White spot disease: Use 50% multi-bacterial WP 300 times or 75% chlorothalonil wettable powder 600 times. Spray once every 10-15 days for 2-3 consecutive times.
(4) Bacterial soft rot, black rot: spraying with 72% agricultural streptomycin or neomycin to 4000 times spray.
(5) Viral disease: In the initial stage of disease, spray 20% of virus A wettable powder 500 times or 7.5 times of lingering emulsion 1000 times or 83 times of resistance increasing agent 100 times, once every 10 days, and spray 2-3 times.
(6) Clubroot disease: Use lime, plant ash, lime nitrogen to regulate soil pH, increase organic fertilizer and calcium to reduce disease, pay attention to crop rotation. From the young field period to the rosette stage, use 50% carbendazim 500 times solution or 70% thiophanate-methyl 1000 times or 600 times chlorothalonil water for 2-3 times to suppress and kill bacteria to reduce losses.
(7) Locust: 50% anti-influx 2000-3000 times or 10% imidacloprid 3000-4000 times spray control.
(8) Plutella xylostella and Pieris rapae: The larvae were sprayed with 25-30 g per mu of BT insecticide or 5% Sodium Tetrachloromethane EC 2000-4000 spray.
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