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Rational fertilization. Before topdressing, apply fully decomposed organic fertilizer, and clean the application of phosphorus and potassium fertilizer in the topdressing stage, control the amount of nitrogen fertilizer, and then spray some foliar fertilizer and micro-fertilizer to enhance the resistance of the plant.
Cool down and drain. The temperature during the day is controlled at 15 °C ~ 20 °C. When the temperature exceeds 20 °C, it should be released in time. The nighttime control is at 10 °C ~ 15 °C, which reduces the worst night and night, reduces condensation, and does not flood the water.
Chemical control. Ignite with 45% chlorothalonil smog, fumigation for 1 night, every 10 days or so. At the beginning of the disease, 70% of the mancozeb WP 600 times solution + new high-fat film is sprayed every 7 to 10 days, and continuous spraying for 2 to 3 times has good preventive and therapeutic effects.
Remove the diseased plants. For plants that have already developed disease, they should be removed in time, and sprayed to protect the tree generals to reduce the spread and spread of bacterial sources
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