Guy Padgett | 8/19/2011 11:32:33 PM
|Go to Fungal Foliar Diseases Home Page|
Click on the links above to go to the Fungal Foliar Diseases home page or the Soybean Disease Atlas home page.
Powdery Mildew (Microsphaera diffusa)
Daniel V. Phillips
University of Georgia
The first symptom is usually a circular area of white to light-gray, superficial powdery growth on the upper leaf surface. Under favorable conditions, cool humid nights and mild dry days, these areas expand rapidly, coalesce and cover the entire leaf surface. All green plant parts may be covered by the powdery growth. Heavily infected leaves turn yellow, then brown, and drop prematurely.
Powdery mildew is controlled with resistant cultivars. Most determinate soybean cultivars are highly resistant to powdery mildew, while many indeterminate cultivars are susceptible.
The LSU AgCenter and the LSU College of Agriculture