Capsicum brown spot disease, the first damage to the leaves, constitutes round or nearly round lesions on the leaves, the lesions are brown at the beginning of the disease, gradually become gray-brown with the lesions, the surface is slightly arched, and the periphery has a yellow halo. The center of the lesion has a light gray center, surrounded by dark brown, and the diseased leaves turn yellow when severe. The stem is also sick and the symptoms are similar to the leaves. [Pathogenesis] The pathogen can be overwintered on the seed, or the mycelium is over the vegetable disease, or the hyphae overwinter on the diseased leaf, becoming the source of infection at the beginning of the year. Diseases often begin in the seedbed. High temperature and high humidity continue for a long time, which is conducive to the onset and extension of the disease. [Control method] 1 After the agricultural method is harvested, the diseased plants and fallen leaves are completely removed, and they are burned intensively, and the non-solanaceae vegetables are rotated for more than 2 years. 2 Seeds are immersed in 55-60 ° C warm water for 15 minutes before disinfection, or 50% carbendazim WP 500 times soaked for 20 minutes, then rinsed and germinated. At the time of live broadcast, 50% carbendazim seed dressing with a seed weight of 0.3% can be used. 2 When the equipment is sterilized and protected, the fumigation room (with no vegetables at the moment) is used before the planting to kill the residual bacteria in the shed. Sulfur fumigation is commonly used in production, 0.25 kg of sulfur per 100 cubic meters of space, saw not 0. 5 kg of mixed and then several groups of ignited fumigation for 1 night. 3 In the early stage of the disease prevention and treatment, spray 50% Dyson zinc wettable powder 500-600 times liquid, or 1:1:200 Bordeaux liquid, or 75% chlorothalonil wettable powder 500-600 times liquid, or 36% methyl sulfur Cyclosporin 500 times solution, or 50% sulphur suspension 500 times solution, or 20% benzoin cream 350 times solution, or 50% chlordamine WP 400 times solution, spray every 7 days Second, successive prevention and control 2 to 3 times. Matting Agent For Matte Paper Coatings Matting Agent For Matte Paper Coatings,Matte Inkjet Paper Matting Agent,Matt Inkjet Paper Silica Dioxide,Paper Coating Matting Agent Guangzhou Quanxu Technology Co Ltd , https://www.skychema.com