Downy Mildew in Cucurbits
Lower surface of pumpkin leaf affected by downy mildew lacking
the pathogen’s characteristic purplish gray sporulation. Diagnostic
spores may form when an affected leaf is placed with damp paper towel
in a closed paper for 12-24 hours.
Courtesy of M.T. McGrath, Long Island Horticultural Research and Extension
Center, Cornell University
<< Previous Photo | Next