Answer: Prevention and control measures: 1. Completely remove diseased branches, diseased ears and diseased leaves. 2. Timely pruning, timely weeding, pay attention to drainage. For leggy plants, nitrogen fertilizer is strictly prohibited before flowering. 3. After the grapes are unearthed, 5 degree lime sulfur or 100 times chlorothalonil is sprayed; the young fruit period begins spraying every 15 days or so until it is harvested.
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