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Second, prevention and control (a) eliminate pathogenic bacteria. After the peanuts are harvested, remove the remaining pathogenic bacteria in the field and do not throw them at random. Plots of diseased remnants should be ploughed in time to accelerate the decomposition of pathogenic bacteria and to prevent germs from infecting peanuts. (b) selection of disease-resistant varieties. Disease resistance is generally grown upright, thick leaves, deep color, large peanut varieties or early maturing varieties, in the incidence of heavier land, can choose to use these varieties to plant, such as Fuhua 2nd, Luhua 14 etc. . (C) strengthen the cultivation and management. To timely sowing, rational close planting, adequate base fertilizer, timely fertilizer, promote the robust growth of peanuts, improve resistance to disease. (d) Chemical control. In the early onset of spraying prevention and control can reduce the disease. A better agent: 80% mancozeb 400 times, 70% thiophanate-methyl 1000-1500 times, and 50% carbendazim 1000-1500. Spraying pesticide should pay attention to spray evenly, spray thoroughly, spray once every 7-10 days, even spray 2 or 3 times, can basically control the occurrence of the disease.
Can not be underestimated: peanut leaf spot
First, the symptoms of peanut leaf spot mainly black spot and brown spot disease, both diseases are mainly to damage the leaves. The onset of peanuts begins with symptoms from the lower leaves and gradually spreads to the upper leaves. Brown spots develop in the early stages of the disease and gradually develop into round or irregular lesions. The brown spot is larger, yellow halos surround the lesions, while the black spot is smaller, the color is lighter than the brown spot, and the edges are neat, with no obvious halos. The weather is humid or long-term rainy, the lesions can be combined into irregular large spots, and the blades are scorching, which seriously affects the photosynthesis. If it occurs on the petiole, stem, or fruit pin, it will produce oval dark brown or brown lesions. If it is heavy, the whole stem or fruit pin will turn black and die, causing the peanut production to drop significantly.