Recently, many farmers have asked how the pepper leaf blight occurs. And how to prevent this disease. The symptoms of pepper leaf blight mainly occur in the foliage, poor ventilation, and excessive water accumulation are among the causes.
First, the symptoms of pepper leaf blight
Mainly harmful to the leaves. At the beginning of the onset of the leaves, there are scattered brown spots, which rapidly expand into round or irregular shaped lesions. The middle part is grayish white, the edges are dark brown, the diameter is 2-10 mm, the lesions are necrotic in the center, easy to perforate, and the diseased leaves are easy to fall off. .
Second, the incidence of pepper leaf blight
The pathogens overwinter with the diseased bodies in the soil and spread by means of air currents. High temperature and high humidity, poor ventilation, partial application of nitrogen fertilizer, excessive growth of plants in the early stage, and water accumulation in the field are easy to develop.
Third, pepper leaf blight prevention and control methods
1. Agricultural measures: To cultivate strong seedlings, nutrient soil should be prepared by using decomposed organic fertilizer. During the nursery process, attention should be paid to ventilation, and the temperature and humidity of the seedbed should be strictly controlled. Strengthen management, rationally apply nitrogen fertilizer, increase phosphorus and potassium fertilizer, spray phytohormone, love more harvest and other foliar fertilizer. After the planting, pay attention to the cultivating loose soil and drain the water in time.
2, chemical control: spraying 64% anti-virus 矾 wettable powder 500 times solution, or 50% metalaxyl WP 600 times solution, 50% carbendazim WP 500 times solution, or 50% benomyl WP 1000 times solution, or 75% methyl thiophanate WP 600 times solution, or 2% agricultural anti-BO-10 water agent 200 times solution, or 50% Krabi WP 1500-2000 times solution, Or 70% of De Gaulle WP 800-1200 times, or 40% DuPont Fuxing 8000-10000 times liquid, or 50% sterilized WP 500-1000 times, or Kexing Dan 500 times, or 50% mixed sulfur suspoemulsion 500 times solution, spray once every 7 days, even spray 2 to 3 times.
The above is the full text of the symptoms and prevention of pepper leaf blight brought by the farmers' software. If you have any other questions about pepper cultivation, you may wish to continue to pay attention to our website. The professional agricultural knowledge is waiting for you to watch!
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