Dear Wisconsin grape growers: Graduate student, Courtney Meeks, is collecting powdery mildew and downy mildew samples for free fungicide resistance testing. If you are observing powdery mildew and/or […]

The following diseases/disorders were identified at the PDDC from June 22, 2024 through June 28, 2024. PLANT/SAMPLE TYPE DISEASE/DISORDER PATHOGEN COUNTY FRUIT CROPS     […]

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 […]

Spring certainly seems unresolved in Wisconsin this year. With warmer temperatures felt across much of the central and southern parts of the state, buds on […]

It’s July in Wisconsin, which means the humidity is up and if you have a history of powdery mildew in your orchard you may be […]

Symptoms of grape diseases have shown up in the vineyards at the West Madison Agricultural Research Station (WMARS). Due to the recent drought conditions, disease […]

We saw reports of bud burst and 1- to 3-inch shoots this past week in Wisconsin. Critical fungicide application timing is now for several grape […]

Description Fungicide resistance to powdery and downy mildews is a growing concern for Midwest grape producers. Developing spray programs that focus not only on disease […]

The PDDC is now once again accepting physical samples for diagnosis, but due to COVID-19, only with limited hours and limited sample processing capacity.  Click […]

This article initially posted on the University of Minnesota Grape Breeding and Enology website If downy mildew and powdery mildew are present on grapevine leaves […]