For the harm of thrips, it is suggested to use avermectin+thiamethoxam or nitenpyram or dinotefuran. Or ethyl spinosad+silicone.

For rust, it is suggested to use myclobutanil, flusilazole, bromothalonil or propiconazole alternately, with smooth leaves and no pesticides. It is recommended to mix with silica gel. Prevention first, comprehensive prevention and control. Use pesticide ingredients alternately, and don't use the same pesticide ingredients continuously. This is the principle of plant protection.

Onion wilt, it is suggested that dimethomorph or fenpropathrin or metalaxyl or propamocarb hydrochloride or ethyl phosphate should be used alternately, and the leaves should be smooth without pesticides, and silicon additives must be mixed. Downy mildew pesticides simultaneously treat epidemic diseases. It is best to add foliar fertilizer. Prevention first, comprehensive prevention and control. Use pesticide ingredients alternately, and don't use the same pesticide ingredients continuously. This is the principle of plant protection.