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Chili pepper disease is a devastating disease that causes the growth of peppers. Once infected with the disease, the pepper plants withered for 3-5 days and died within 7-10 days. At this time, if the rain or field water every day, it is easy to cause extensive disease epidemic, or even no harvest. First, the symptoms of the disease The disease can occur throughout the growth period of pepper. The incidence of seedling stage, the site of the disease at the base of the stem, was dark green water-like soft rot. In the adult stage, leaves, branches, stems and fruits can be affected. The leaves were infected, the lesions were nearly round, the central dark brown, and the edges were yellow-green. The onset of fruit originated in the peduncle, which was dark green water-soaked lesions, and later became soft rot. When the humidity was high, a white mold layer was formed. After drying, it remained as a stiff fruit on the plants. The branches were infected and showed round brown streaks. The stems are infested, the vascular bundles are brown, and the plants quickly wither until they die. Second, the incidence of disease pepper disease is a fungal disease. The disease is mainly wintering in the soil or seeds with oospore and chlamydospore. Among them, the prevalence of diseased bodies in the soil is high, and it is the main primary infestation source. June to August each year is the peak period of the disease. High-temperature and high-humidity weather facilitates the proliferation of the pathogen. Storm water, irrigation water or farming operations accelerate the spread of the disease. The heavy texture of the soil reduces the resistance of pepper roots to disease. According to the survey, continuous work is more important than declining, and monopolization is more important than intercropping. The temperature in the field is 25-30°C and the relative humidity is more than 85%, which is easy to cause the epidemic. Third, control measures 1, agricultural control (1) selection of disease resistant varieties. You can choose Yuejiao No. 3, Taiwan Xiyuan pepper and other disease-resistant varieties. (2) Reasonable turnaround. Reasonable rotation with rice or legumes for more than three years; not with solanaceae, cucurbitaceae and melon crops or crop rotation. (3) Cultivation with high ridges, flood prevention and drainage; cultivation of age-appropriate seedlings, and strive for 80% of plants to bud when transplanting. 2, chemical control (1) seed disinfection. Seeds were soaked in warm water at 52°C for 3 minutes and soaked in 1% copper sulfate solution for 5 minutes. (2) timely spraying. In the early stage of onset or in the days following high temperature and high humidity weather, timely application of pesticide control. It can be sprayed with 500 times liquid thiryrotoxicosis or 1000 times liquid sterilization sterilizer, sprayed 2-3 times and sprayed once every 7-10 days. (3) Control center strains. The diseased plant was removed in time and the diseased area was treated with 800-fold formalin solution.