Category: Grapes
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Posted on July 9, 2020
Increase Fruit Quality of Cold Climate Grapes With Cluster-Zone Leaf Removal
Cluster-zone leaf removal is a very effective practice to open up the canopy and increase the exposure of clusters to sunlight and airflow. What are […]
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Managing Japanese Beetles in Vineyards
Japanese beetle adults (Figure 1; JB) are out and about, feeding and mating on many different fruits, vegetables, field crops, and ornamentals. Numbers have been […]
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Posted on July 6, 2020
UW-Madison/Extension Plant Disease Diagnostic Clinic (PDDC) Update July 3, 2020
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 […]
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Posted on June 26, 2020
Grape Cultivar Developmental Stages: June 24, 2020
Phenology At the West Madison Agricultural Research Station (WMARS) in Madison, WI, shoot development as of June 24 ranged between E-L* stage 27 (“Setting, young […]
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Posted on June 25, 2020
Tissue Analysis to Determine Nutrient Status of Cold-Hardy Wine Grapes
In Wisconsin, mature leaf petiole is the most common tissue used to assess the vines nutritional status. There are two recommended timing for petiole sampling: […]
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Posted on June 22, 2020
New Reduced Risk Insecticide: Verdepryn
Verdepryn is a new insecticide registered for use in Wisconsin on several crops including pome fruit, grape, berries, and small fruit, including cranberry. It was […]
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Posted on June 18, 2020
What to Do Now in the Vineyard: Post-Bloom
This webinar features quick updates and tips from University of Minnesota and University of Wisconsin-Madison experts on canopy management tasks like leaf pulling, tucking, and […]
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Posted on June 12, 2020
Grape Cultivar Developmental Stages: June 12, 2020
Phenology At the West Madison Agricultural Research Station (WMARS) in Madison, WI, shoot development as of June 11 ranged between E-L* stage 18 (“Flower caps […]
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Grape Scouting Report: Galls
The grapes at the West Madison Research Station (WMARS) vineyard showed the presence of a few grape phylloxera galls on 6/11/20 (Fig 1). Grape phylloxera […]
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Posted on May 29, 2020
Grape Scouting Report: First Grape Phylloxera Galls and Grape Plume Moth Larvae
Scouting of the grapes at the West Madison Research Station (WMARS) vineyard on 5/27/20 showed the presence of a few grape phylloxera galls (Fig. 1) […]