Gerald Holmes, Strawberry Center, Cal Poly San Luis Obispo, Bugwood.org
Sally Miller, The Ohio State University, Bugwood.org
Sally Miller, The Ohio State University, Bugwood.org
Sally Miller, The Ohio State University, Bugwood.org
Sally Miller, The Ohio State University, Bugwood.org
Sally Miller, The Ohio State University, Bugwood.org
Sally Miller, The Ohio State University, Bugwood.org
Sally Miller, The Ohio State University, Bugwood.org
Underside of butternut squash leaf showing signs of both downy mildew (dark sporulation) and powdery mildew (white sporulation). Note that powdery mildew grows over veins while downy mildew is typically bound by veins giving lesions an angular shape. August 1998
Purplish gray coloration of downy mildew sporangia on cucumber
Early infection of downy mildew on cucumber.
Advanced stage of downy mildew on cucumber.
Downy mildew on pumpkin.
Close up of downy mildew on pumpkin.
Downy mildew on canteloupe
Downy mildew on watermelon.