1. Agricultural measures Avoid continuous cropping, and choose land plots that are well lit, well ventilated, and easy to drain. After transplanting the disease-free strain, cover it with straw. To prevent excessive humidity, timely removal of the old leaves at the bottom so that the letters can be air and light. The stems and leaves of diseased plants should be burned after cleaning.
2. In the early stage of disease prevention and treatment, 75% chlorothalonil wettable powder can be sprayed with 600 times, or 50% thiophanate WP 500 times, or 80% zeocin WP 800 times, or 70%. Mancozeb WP can be 500 times liquid, or 50% mixed sulfur suspension 500 times, or 50% polysulfide suspension 500 times, or 36% thiophanate-methyl glue 400 times. Every 7 to 10 days spray 1, even governance 2 or 3 times. In addition, for lesions that appear at the base of the stem or at the initial stage of grafting, the "920" dilution (the dilution factor is determined depending on the active ingredient) can be applied to the lesion.
2. In the early stage of disease prevention and treatment, 75% chlorothalonil wettable powder can be sprayed with 600 times, or 50% thiophanate WP 500 times, or 80% zeocin WP 800 times, or 70%. Mancozeb WP can be 500 times liquid, or 50% mixed sulfur suspension 500 times, or 50% polysulfide suspension 500 times, or 36% thiophanate-methyl glue 400 times. Every 7 to 10 days spray 1, even governance 2 or 3 times. In addition, for lesions that appear at the base of the stem or at the initial stage of grafting, the "920" dilution (the dilution factor is determined depending on the active ingredient) can be applied to the lesion.
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