What diseases need to be prevented and controlled when growing sweet peppers?
What diseases need to be prevented and controlled when growing sweet peppers? Please give an introduction. When growing sweet peppers, the following diseases need to be prevented and controlled: Phytophthora blight. In the early stage of the disease, fumigate each mu with 110 g to 180 g of 45% chlorothalonil smoke agent, once every 7 days, 3 to 4 times depending on the severity of the disease, or dust each mu with 1 kg of 5% chlorothalonil dust, once every 7 days,...
What diseases need to be prevented and controlled when growing sweet peppers? Please give an introduction.
When growing sweet peppers, the following diseases need to be prevented and controlled:
Phytophthora blight. In the early stage of the disease, fumigate each mu with 110 g to 180 g of 45% chlorothalonil smoke agent, once every 7 days, 3 to 4 times depending on the severity of the disease, or dust each mu with 1 kg of 5% chlorothalonil dust, once every 7 days, for 2 to 3 consecutive sprays, or spray with 500 times dilution of 64% oxadixyl mancozeb wettable powder, or 500 times dilution of 70% phosethyl-Al mancozeb wettable powder. After finding the primary infected plants in the middle and late stages, drench the roots with 800 times dilution of 50% methyl frost copper wettable powder or 600 to 800 times dilution of 72.2% propamocarb aqueous solution, 100 ml to 200 ml per hole.
Anthracnose. In the early stage of the disease, spray with 500 times dilution of 50% thiophanate-methyl sulfur suspension concentrate, or 600 to 800 times dilution of 80% anthracnose thiram wettable powder, or 1:1:200 Bordeaux mixture, or 600 times dilution of 75% chlorothalonil wettable powder, once every 7 to 10 days, for a total of 2 to 3 sprays.
Viral disease. In the early stage, spray with 1500 times dilution of 10% imidacloprid wettable powder, or 1000 to 2000 times dilution of 40% dimethoate emulsifiable concentrate, or 1000 times dilution of 80% dichlorvos emulsifiable concentrate. At the initial onset, spray with 400 times dilution of 20% virus A or 400 to 500 times dilution of 1.5% zhibingling emulsifiable concentrate, once every 7 days, for 3 consecutive sprays.
Scab. In the early stage of the disease, spray with 4000 times dilution of 72% agricultural streptomycin soluble powder, or 500 times dilution of 50% copper bis(dodecylbenzenesulfonate) wettable powder, or 300 times dilution of 14% copper ammonia complex aqueous solution, once every 7 to 10 days, for 2 to 3 consecutive sprays.
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