The edges of vegetable leaves are yellow. What kind of pesticide is used?

This is a typical cauliflower black rot, which is a bacterial disease. The leaf edge of the diseased cauliflower is V-shaped.

Prevention and control: Bacterial drugs such as copper thiamine, copper thiamethoxam, agricultural streptomycin, zhongshengmycin, thiamethoxam or copper quinoline can be used alternately, or two components with different action mechanisms can be mixed and sprayed with potassium dihydrogen phosphate. Once every 5-6 days, the pesticide is applied continuously for more than 2-3 times.

Suggested drugs, such as copper thiamethoxam+thiamethoxam+potassium dihydrogen phosphate (multi-element foliar fertilizer).

(Bacterial drugs with different components are used alternately)