Grape disease risks from last week, downy mildew forecast, and a note on fungicide resistance

[Nita, Mizuho]

Grape Disease Risks: 7/2-7/9/2025, downy mildew 8-day forecast, and comments on fungicide resistance – Virginia Grape Disease Updates

Grape Disease Risks: 7/2-7/9/2025, downy mildew 8-day forecast, and comments on fungicide resistance 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 = Powde ext.grapepathology.org

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Mizuho Nita, PhD

Associate Professor and Extension Specialist, Grape Pathology

AHS Jr. Agricultural Research and Extension Center, Virginia Tech

595 Laurel Grove Rd., Winchester, VA 22602

Phone: 540-232-6047

Web: http://grapepathology.org