University of Maryland Extension

timely viticulture

Crop Management

Timeley Viticulture - Mid Season
The goal of most grape growers is to produce the highest possible quality grapes for wine. For making the best wine, the highest quality grapes are typically the most mature and uniformly ripened. In today’s quality driven marketplace, the best fruit will command the greatest demand and the highest...

Downy Mildew Management

Timely Viticulture Timeline Post Bloom
Downy mildew is now a year-long challenge for grape growers in the East. Downy mildew is often difficult to manage because it requires specific weather conditions to become a serious threat, but it can develop into an epidemic very quickly in favorable weather. Downy Mildew Basics The downy mildew...

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...

Pre-Bloom To Post-Bloom Disease Management

Timely Viticulture Timeline Pre-bloom, Bloom, and Post Bloom
The growth period from 2 weeks pre-bloom until 3 to 4 weeks post-bloom is the most critical for protecting foliage, and especially flowers and newly set fruit from black rot ( BR ), Phomopsis ( Ph ), powdery mildew ( PM ), Downy mildew ( DM ), and Botrytis bunch rot infections. As each disease has...
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