Common Diseases and Drug use of Pepper

Phytophthora infestans: control with ethyl phosphine and manganese zinc wettable powder. Virus disease: prevention and treatment with Zhibing Ling emulsion and poison clearing agent. Root rot: Sulphur suspension emulsion, thiophanate-methyl, carbendazim WP, shuangxiaoling aqueous solution control. Grey mold: control with pythium WP. Cotton bollworm: Control with cyhalothrin EC. Tea yellow mite: control with pyridaben ec and fenpyrochlor suspension. Aphids: Control with imidacloprid WP.

1. Pepper blight

At the initial stage of epidemic disease occurrence, spray 64% frost and manganese zinc wettable powder 500 times, 50% frost and liquid copper wettable powder 600 times, or 70% ethyl phosphine and manganese zinc wettable powder 500 times, spray once every 5-7 days or so, continuously spray 2-3 times.

II. Pepper virus disease

At the initial stage of virus disease, spray 1.5% Zhibingling emulsion 1000 times solution and 5% bacteria toxin clearing agent 200-300 times solution for prevention and control, which is beneficial to alleviate virus symptoms. During this period, spray once every 5-7 days or so for 3-5 times continuously.

III. Pepper root rot

At the initial stage of root rot occurrence, spraying or watering 800 times solution of sulfur suspension emulsion, 50% thiophanate-methyl wettable powder, 50% carbendazim wettable powder and 200-300 times solution of 10% double-effect water solution can be used for prevention and control. During this period, spraying can be done once every 10 days, and continuous spraying can be done for 2-3 times.

IV. Pepper gray mold

At the initial stage of gray mold occurrence, spray 25% azoxystrobin suspension 2500-3000 times solution, or 50% ipromicon wettable powder 800 times solution for prevention and control, during which it can be sprayed once every 7 days for 3 consecutive sprays, or spray 50% procymidone wettable powder 800 times solution, generally spray once every 1 day for 3 consecutive sprays.

5. Chili bollworm

At the early stage of cotton bollworm occurrence, spray 2.5% beta-cypermethrin EC 2000-2500 times or 2.5% cyhalothrin EC 2000-2500 times for control.

VI. Chili tea mite

At the early stage of tea yellow mite occurrence, spraying 3000 times solution of 15% pyridaben EC and 3000 times solution of 5% fenazuron suspension can be selected for control.

Seven, pepper aphids

At the initial stage of aphid occurrence, spray 10% imidacloprid wettable powder 2000-3000 times solution or 20% acetamiprid wettable powder 5000-10000 times solution for prevention and control, and spray once every 7-10 days for 2-3 times continuously.