Blogs

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: 6/25 – 7/2/2025 and an 8-day downy mildew forecast Grape disease risks from the NEWA 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 DM = Downy mildew....
Grape Disease Risks: 6/19 – 6/25/2025, 8-day downy mildew forecast, Japanese beetle, and poor fruit set Grape disease risks from the NEWA 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 DM = Downy mildew....
Grape Disease Risks: 6/11-18/2025, 8-day downy mildew forecast, and Yellow Tulip Popular Weevil Grape disease risks from the NEWA 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 DM = Downy mildew....
Grape Disease Risks: 6/4-6/11/2025, 8-day downy mildew risk forecast, slides from today’s meeting, and Isomate GBR Z Grape disease risks from the NEWA 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 DM = Downy mildew....
Grape Disease Risks: 5/29 – 6/4/2025 (+ downy mildew risk for the next 8 days) Sorry for the delay. I was away due to an extension event. 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...
Grape Disease Risks: 5/21-28/2025 + DM forcast 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 DM = Downy mildew. N/A means there is no data...
Grape Disease Risks: 5/14 – 5/21/2025 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 DM = Downy mildew. N/A means there is no data...
Grape Disease Risk Events: 5/7 – 5/15/2025 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 DM = Downy mildew. N/A means there is no data...
Grape Disease Risk Events: 4/30-5/7/2025 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 DM = Downy mildew. N/A means there is no data...
At bloom grape disease management reminders I hope you are enjoying the much-needed rains in your area. It seems a bit early to talk about bloom, but vines are moving much quicker than I anticipated, probably due to the warm April. Bloom begins a critical period...