Author: wendymcfaddensmith
The lowdown on downy mildew this summer, 2026
The rainy, cloudy weather we’ve been having is ideal for downy mildew infection. We’ve found sporulating lesions on leaves andContinue Reading
Copper 53 W label updated for use on vinifera grapes
Until recently, the Copper 53 W label indicated a warning “Do not use on vinifera varieties.” This caused some consternationContinue Reading
Clearing the Cobwebs: Copper Use for Grape and Stone Fruit Diseases
Katie Goldenhar, OMAFRA Plant Pathologist – Horticulture & Wendy McFadden-Smith, Tender Fruit and Grape IPM Specialist Do you really knowContinue Reading
We want your grape downy mildew!
For the 2026 growing season, OMAFA has funding to screen Ontario grape downy mildew for sensitivity to phosphorous acid. ContactContinue Reading
Grapevine Trunk Disease Workshop
When? February 20, 10-12 Where? 1364 Concession 6, NOTL (Look for the Grape tailgate tour sign) Come and learn aboutContinue Reading
Grape Tailgate Tour, August 27, 2025
The Grape Tailgate Tour is BACK! Come and learn about the latest viticultural research in Niagara. 9:00 Grapevine Trunk DiseaseContinue Reading
Resistance management for phosphorous acid fungicides in grapevines
By Wendy McFadden-Smith and Katie Goldenhar, OMAFA Phosphorous acid products include Aliette, Confine Extra, Phostrol and Rampart. They have becomeContinue Reading
Ridomil Gold 480 SL label expansion to include grapes for 2025
With the restriction on mancozeb in grape to one prebloom application, use of Ridomil Gold-MZ was also restricted and useContinue Reading