Components of a good PM management program:
1. Choose PM-tolerant or -resistant hybrids whenever possible to maximize host plant resistance against this disease.
2. Scout for PM beginning mid-summer on the upper and lower leaf surfaces throughout the field and leaf canopy. If even a few colonies are found, treatment should begin immediately and continue until harvest.
3. Know the Fungicide Resistance Action Code (FRAC) or mode of action (MOA) number (found on the label) for each fungicide used on your farm and how to rotate it.
Powdery Mildew
South Carolina Grower Update | October 30, 2023
Clemson Extension Agents Crop Update: Squash are still hanging on, but with increased disease pressure from powdery mildew and the occasional out break of downy mildew. These plantings are on their last leg and are recommended to be terminated.
Powdery mildew management | VGNews
Plant Pathologists at Land Grant Universities conduct fungicide efficacy trials on cucurbits to determine spray programs to recommend. Results of these trials are published in Plant Disease Management Reports.
Michigan Cucurbit update | September 6, 2023
Michigan Cucurbit update | August 30, 2023
Deer beat Powdery & Downy mildew for #1 vegetable pest
The American Vegetable Grower online magazine included wildlife pests for the first time in the 2023 production portion of the annual State of the Vegetable Industry survey. Deer bumped powdery mildew disease, the pest frontrunner in previous years, down the list.
Fungicide management options | SC Grower
A fungicide sensitivity bioassay was conducted between June 1 and June 10 to determine which fungicides can be used against the current outbreak of powdery mildew on squash, watermelon and other cucurbits.
Powdery Mildew on Watermelon in SC
CucCAP Plant Pathologist Tony Keinath found Powdery Mildew on seedless watermelon at the Clemson Coastal Research and Education Center (REC) on Tuesday, May 23.
