Grape Disease risks 4/16-4/23/2025

Here are snapshots from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and… Read more

Grape Disease risks 4/10-4/16/2025

Here are snapshots from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and… Read more

Grape Disease risks 4/5-/9/2025 and Slides from today’s meeting

Here are snapshots from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and… Read more

Early Season Grape Disease Management Reminders

Phomopsis cane and leaf spot One of the diseases you need to consider soon after bud break is Phomopsis cane and leaf spot. It causes minor leaf spots, which are… Read more

VCE Viticulture Winter Workshop Registration Links and Pest Management Guides

I have new links for registration. Please use the following links. Registration: For the pruning workshop (2/21), please contact Ms. Beth Sastre. For the First Grape Disease Management Workshop (3/6),… Read more

Save the date: VCE Viticulture Winter Workshops 2025

The Virginia Tech viticulture team (Drew, Tremain, and I) will hold a series of workshops where we will discuss these diseases in depth. Please attend one of these so that… Read more

A link to the EPA public comment site, mancozeb survey, and slides from yesterday’s online meeting.

Federal regulation re-evaluation for mancozeb and malathion The EPA is reevaluating the uses of mancozeb and malathion this time, and their proposed action is to eliminate mancozeb from grapes. To… Read more

Grape Disease Risks 8/21 – 8/28/2024

Here are snapshots from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and… Read more

Grape Disease Risks: 8/14-8/21/2024

Here are snapshots from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and… Read more

Grape Disease Risks: 8/7-8/14/2024, Slides from last week, and a List of short PHI fungicides.

Here are snapshots from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and… Read more
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