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. N/A means there is no data or some issues with the NEWA. I have reported these issues to the appropriate parties, so, hopefully, it will be back soon.
At Winchester, our Chardonnay vines were about 50% bud break as of yesterday (but I have a feeling they will be 100% today since it was warm yesterday). At this point, the main focus is Phomopsis, but things seem relatively safe (assuming we don’t receive a long rain today…)
Please see this post for tips on early-season grape disease management.
2024 Pest Management Guides
Pest Management Guide is a publication from Virginia Cooperative Extension that contains information on how to manage diseases, insect pests, and weeds. If you have not, please download it (they are free!) and plan for the season.
