Grower input needed on sour rot and wasp challenges in vineyards

Timothy Miles<milesti2@msu.edu>, Michigan State University, Department of Plant, Soil and Microbial Sciences, and Rufus Isaacs<isaacsr@msu.edu>, Michigan State University, Department of Entomology -

Michigan State University Extension is looking for your input about sour rot and wasp control in grapes.

Sour rot and a wasp on grapes
Sour rot and Botrytis bunch rot symptoms on hybrid grapes observed near harvest. Photo by Timothy Miles, MSU Plant, Soil and Microbial Sciences.

Sour rot of grapes can reduce yield and quality, and it is challenging to manage. Part of this is because insects such as wasps can move the causal organisms (e.g., fungi and bacteria) between clusters as fruit ripen. Michigan State University Extension is working on solutions to this problem with colleagues at the University of Wisconsin-Madison. This group has developed a quick (less than 5 minutes) survey to gather input on the scale of your problems with sour rots, and to learn how growers across the Great Lakes region are tackling this problem.

The survey asks about disease management and insects associated with sour rots. This information will be useful for tailoring our work to address this problem.

Take the Sour Rot and Wasp Survey

Thanks in advance for completing this.

This article was published by Michigan State University Extension. For more information, visit https://extension.msu.edu. To have a digest of information delivered straight to your email inbox, visit https://extension.msu.edu/newsletters. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464).

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  • agriculture,
  • fruit & nuts,
  • grape disease management,
  • grape insect control,
  • grape insects,
  • grapes,
  • integrated pest management,
  • msu extension,
  • small fruit,
  • sour rot,
  • wasps

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