University of Maryland Extension

Mid-Season Disease Management

Mid-Season Disease Management

Timely Viticulture Timeline-Mid-Season
At 3 to 4 weeks after bloom, the risks of black rot ( BR ), Phomopsis ( Ph ; including cane and leaf spot, and fruit rot), and powdery mildew ( PM ) are decreasing. Downy mildew (DM) will be the main threat. While most Botrytis bunch rot infections occur around bloom and fruit set, bunch closing...
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