Grape cob brown rot often occurs in the high temperature and rainy season in summer, especially in garden grapes, with poor ventilation and light transmission, and the incidence is more serious. one. Symptoms The disease is mainly responsible for the cobs of grape ears. After being damaged, it becomes brown, soft, dry, and contracted, resulting in wilting and shedding of grains, resulting in a large reduction in yield. Second, prevention and treatment is to remove the sick, the growing season, timely collection and burning of the sick, eliminate the source of the disease. The second is to strengthen soil fertilizer management, increase tree vigor, and increase disease resistance. The proportion of N, P, and K is properly balanced and the input of calcium, boron, and potassium fertilizers is emphasized. Pay attention to drainage, reasonable pruning, timely picking and disposal, improve ventilation and light transmission conditions. The third is chemical control. Tests in the past two years have shown that the agents with better efficacy are Miaolingling, Ruiduomycetes and Dasheng M45. The specific application method can be used to spray 14.5% of the multi-effect water-soluble powder 800 times before the beginning of onset or at the early stage of the disease, and then spray once every 15 days. It can also be used 600 times liquid of Ruiduxue Mildew Powder or M45 800 times . The above-mentioned agents can effectively control the hazards of the disease as long as they are used at intervals of 15 days, alternately sprayed and sprayed for 3-4 times.
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