Control of rape downy mildew

1. Strengthen water and fertilizer management. To apply basic fertilizer, increase phosphorus, potassium fertilizer. After harvesting, diseased leaves and diseased plants should be removed from the field and buried deep or burned, and deep-turning the soil can reduce the spread of germs in the fields. 2. Chemical control. At the beginning of the disease, 72% of the creamy WP can be used as 800 times, or 78% of the WP can be used as 500 times, or 56% of the WP can be used as 700 times, or 69% of the MnZn WP 600 Diluent, or 50% methicone wettable powder 600 times, or 90% ebony wettable powder 500 times, or 70% ethidium manganese wettable powder 400 times, or 72% WP WP 700 Diluent, 72% KeXiang WP 600 times, or 58% Methanomanganese WP 500 times, 72.2% Propano Weike 600x, 52.5% Fast Water Dispersible Granule 1500 Double liquid, or 25% metalaxyl WP 800 times liquid spray, spray every 6~8 days, spray 2~3 times.

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