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Discipline: Grape pathology

Investigator: Mizuho Nita

Title: Virginia Grape Disease Updates

Description: Seasonal updates on wine grape disease management, extension meeting announcements, and other related topics from a grape pathology lab at AHS AREC.

Virginia Grape Disease Updates

Grape Disease Risks 5/24 – 5/31/2023 Here’s a snapshot from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and DM = Downy mildew. This information was made available through...
Grape Disease Risks 5/17 – 5/24/2023 Here’s a snapshot from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and DM = Downy mildew. This information was made available through...
Grape Disease Risks 5/10 – 5/17/2023 Here’s a snapshot from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and DM = Downy mildew. This information was made available through...
Grape Disease Risks 5/3 – 5/10/2023 (and tomorrow’s virtual meeting) Here’s a snapshot from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and DM = Downy mildew. This information was made available through...
Grape Disease Risks 4/27 – 5/3/2023 I hope your vines did not suffer from recent frost events. Based on what I heard from growers, some growers in the Shenandoah Valley suffered minor damage on specific cultivars, and a few suffered severe damage. Here’s a snapshot from...
Pest Management Guides 2023 Dear all, Here are links to the new Pest Management Guides. It should open a pdf file. If the link becomes inaccessible in the future (it happened last year), please send me an email so that I can fix it....
Grape disease risk events: 4/21/2023 – 4/27/2023 Here’s a snapshot from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and DM = Downy mildew. This information was made available through...
Grape disease risk events: 4/12/2023 – 4/20/2023 Here’s a snapshot from the last week, showing the number of days with the risk of each disease: Ph = Phomopsis, PW = Powdery mildew, BR = Black rot, and DM = Downy mildew. This information was made available through...
Grape disease risk events: 4/4/2023 – 4/11/2023 It looks like pretty much all of us are experiencing a bud burst 2-3 weeks ahead of a typical year (which seems to happen rather rarely nowadays). Based on the Sentinel Vineyard Core Group, Chardonnay vines are EL stage 7-9...
Registration link to our monthly virtual viticulture meeting series Dear all, It looks like the 2023 season has started for many of us. I saw some bud breaks in central VA last week, and our Chardonnay started to open today. As with the past three years, we would like...