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Grower Information

App’s of Interest

  • FRAC MOA – Search which active ingredients belong to which mode of action group
  • PMApp – Test your ability to rate powdery mildew! By the University of Adelaide.
  • Calibrate My Sprayer – A quick tool to help with field calibration of sprayers by Clemson University.

Resistance Testing


Interested in participating in grape powdery mildew resistance testing? Contact your regional representative below:

Pacific Northwest

Michelle Moyer or Walt Mahaffee


Monica Cooper


Melanie Ivey


Phil Brannen


Tim Miles


Walt Mahaffee


Are you a local Extension specialist interested in participating for your region? Contact Michelle Moyer.