In 2023, the PDDC continues to provide diagnoses through examination of digital photographs, as well as physical samples.  Click here for the PDDC’s current submission […]

I’m receiving reports of powdery mildew observations in Wisconsin vineyards. While we do not often associate drought conditions with grape diseases, powdery mildew is an […]

Phenology At the West Madison Agricultural Research Station (WMARS) in Madison, WI, shoots from primary buds average around E-L* stage 32 (Beginning of bunch closure, […]

We are seeing a lot of these odd, yet very common, insects in grapes and strawberries during our scouting and research, and I got some […]

Phenology At the West Madison Agricultural Research Station (WMARS) in Madison, WI, shoots from primary buds average around E-L* stage 31 (Berries pea-size) in Marquette […]

I saw my first Japanese beetle adult (Figure 1; JB) today at a collaborating vineyard where we are looking at the interaction of social wasps […]

Phenology At the West Madison Agricultural Research Station (WMARS) in Madison, WI, shoots from primary buds average around E-L* stage 23 (17-20 leaves separated; 50% […]

Wisconsin vineyards are now in or approaching one of the most critical disease prevention periods of the entire season, pre-bloom through post-bloom, which spans 2 […]

In our latest videos from the vineyard, Dr. Amaya Atucha discusses shoot thinning high cordon Petite Pearl and Marquette grapevines

Phenology At the West Madison Agricultural Research Station (WMARS) in Madison, WI, shoots from primary buds average around E-L* stage 12 (5 leaves separated; shoots […]