May Northern Grapes Newsletter

May 5, 2014

News You Can Use

Grape Disease Management

Anthracnose on grape berries. (Photo: Patty McManus)

 

Every experienced grape grower knows that good disease management program is a crucial component of growing high-quality grapes. Early season control is especially important, as flowers and small berries are quite susceptible to powdery mildew, downy mildew, and black rot.

Because cold-hardy grape cultivars are still relatively new, we’re still learning about the different cultivars’ resistance and susceptibility to the range of grape pathogens. Therefore, one of the objectives of the Northern Grapes Project is to evaluate disease resistance and the cultivars’ susceptibility to copper- and sulfur-based fungicides.

Below is a list of resources that will help you build an effective disease management program.

Grape Disease Management Basics (and All About Anthracnose) by Wayne Wilcox, Cornell University and Patty McManus, the University of Wisconsin. April 10, 2012 Northern Grapes Project webinar.

https://www.youtube.com/watch?v=2Bc5vdsjbI0&feature=youtu.be

The Disease Management Puzzle: Putting the Pieces Together by Dean Volenberg, University of Wisconsin Extension – Door County. June 4, 2013 Northern Grapes News (Vol. 2, Issue 2).

http://northerngrapesproject.org/wp-content/uploads/2014/04/May-2014-DiseaseMgmtVolenberg.pdf

Grape Disease Control, 2013 by

Wayne Wilcox, Cornell University. A rather lengthy document that contains an update and review of how to control grape fungal diseases in the east. (Will updated this link with the 2014 version once it’s released.)

http://www.fruit.cornell.edu/grape/pdfs/Wilcox-Grape%20Disease%20Control%202013.pdf

The 2014 Midwest Small Fruit and Grape Spray Guide. Contains

general guidelines to use as you develop your grape spray program. Also has information about fruit grower newsletters, pesticide drift, plant diagnostic lab listings, and much more.

https://ag.purdue.edu/hla/Hort/Documents/ID-169.pdf

Terence Bradshaw, UVM Tree Fruit and Viticulture Specialist

Where trade names or commercial products are used for identification, no discrimination is intended and no endorsement is implied.
Always read the label before using any pesticide.
The label is the legal document for the product use.
Disregard any information in this newsletter if it is in conflict with the label.

The UVM Tree Fruit and Viticulture Program is supported by the University of Vermont Agriculture Experiment Station, a USDA NIFA E-IPM Grant, and USDA Risk Management Agency Funds.

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