Anthracnose is a common and frequent disease that damages peppers. It can cause loss of about 20%, which is more than 50%. It usually begins in June, and is prosperous from July to August. It mainly damages the fruit, and leaves and stems can also be damaged. Ripening leaves and fruits or ripe fruits are more susceptible to disease, and young fruit is rarely affected. First, the onset of symptoms of leaf damage, occurred in the old leaves, green spots, water spots, after the brown, the central gray, nearly round, slightly sunken, late turn black spots; fruit infected, the first brown water Stains are round or irregular shaped lesions, after the expansion of the subsidence, spotted round black or orange-red small particles, dry and easy to shrink, rupture, wet surface overflowed red viscous material, disease fruit rot Stems and fruit stalks are killed, forming irregular brown pitted spots, and easily broken when dry. Second, the onset of pathogenic bacteria latent in the seeds or attached to the surface of the seed, or pseudo-sclerotia with the sick body overwintering. By wind, rain, insects, etc., it can also be directly penetrated from the wound. Onset temperature is 12-33°C, air humidity is above 95%. High temperature and rain, poor drainage, planting too dense, a lot of nitrogen fertilizer, poor ventilation, and easy prevalence. Third, the prevention and control methods 1, the selection of disease-resistant varieties, such as Yahua 105, Yahua 205, etc., from the disease-free fruit on the election, or seed soaked in warm water at 55 °C for 30 minutes into cold water after cooling, dry and sowing. It can also be soaked with 1% copper sulfate for 5 minutes. After the removal, mix the appropriate amount of plant ash or hydrated lime to sow. 2. Use seedlings for nutrition cultivation to cultivate age-appropriate seedlings. Rotate with melons and beans. Narrow ditch cultivation, rational close planting. Drain in time. Increase phosphorus and potassium fertilizers. Remove diseased leaves and fruit in time. 3. After the diseased plant was found in the field, the 80th anthrax anthraquinone WP could be used 800 times, 1:1:200 Bordeaux, 75% chlorothalonil wettable powder 500-600 times, and 70% Mancozeb WP. 400-500 times liquid, 70% thiophanate-methyl wettable powder 600-800 times liquid, 50% carbendazim WP 500 times, Green Hunter No. 2 and No. 2 4000 times liquid, etc., spray for the first time Should not be later than when there are two layers of fruit, once in 7-10 days, a total of 3 times. It is better to add 1:800 times of high-yield treasure when spraying.
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