How to control the long red spot of pepper
Question: The reader asked, the pepper leaves appear red-brown spots, what is this disease, how to prevent?
Wang Zaiqiang: According to the description, it is determined that this is a bacterial leaf spot disease of pepper. Bacterial leaf spot of pepper mainly damages the leaves, and initially appears yellow-green irregular water-soaked small spots, and after the expansion, it turns into a reddish-brown or dark brown to rust color, and the lesions are of membranous and of varying sizes. When dry, the lesions are mostly red-brown. The disease has a rapid rate of expansion. On a single leaf or on most leaves, the plant can still grow and most of the leaves fall off. Bacterial leaf spot disease is obvious at the junction of the health, but not uplift, unlike scab. The pathogens mainly live on the seeds and sicknesses, and they spread through the wind and rain or irrigation water in the fields and invade the leaves of the pepper. The optimum temperature for the growth and development of pathogens is 25-28°C. High temperature, high humidity, poor drainage, heavy spasm, sparse fertility, and weight loss are all serious. The recent increase in humidity on successive cloudy days is the main cause of the disease.
Control methods: 72% of streptomycin 3000 times or 20% Yetkonazole 1000 times or 2% of kasugamycin 1000 times (plus agricultural vigor 750 times), spraying once every 5-7 days, serious Spraying once in 3-5 days can effectively prevent the occurrence of the disease. When spraying, imidacloprid and avermectin can be added to control aphids and mites at the same time.
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