downy mildew (Pseudoperonospora cubensis) in Southern Plant Diagnostic Network

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Underside of butternut squash leaf showing signs of both downy mildew (dark sporulation) and powdery mildew (white sporulation). August 1998

Gerald Holmes, Strawberry Center, Cal Poly San Luis Obispo, Bugwood.org

Underside of butternut squash leaf showing signs of both downy mildew (dark sporulation) and powdery mildew (white sporulation). August 1998

Underside of butternut squash leaf showing signs of both downy mildew (dark sporulation) and powdery mildew (white sporulation). August 1998  

Gerald Holmes, Strawberry Center, Cal Poly San Luis Obispo, Bugwood.org

Underside of butternut squash leaf showing signs of both downy mildew (dark sporulation) and powdery mildew (white sporulation). August 1998  

lower leaf surface

Clemson University - USDA Cooperative Extension Slide Series , Bugwood.org

lower leaf surface

downy mildew (<em>Pseudoperonospora cubensis</em>) symptoms on squashes (general) (<em>Cucurbita pepo</em>)

Jason Brock, University of Georgia, Bugwood.org

downy mildew (Pseudoperonospora cubensis) symptoms on squashes (general) (Cucurbita pepo)

downy mildew (<em>Pseudoperonospora cubensis</em>) symptoms on squashes (general) (<em>Cucurbita pepo</em>)

Jason Brock, University of Georgia, Bugwood.org

downy mildew (Pseudoperonospora cubensis) symptoms on squashes (general) (Cucurbita pepo)

Close-up of underside of the infected areas which look more like discrete spots.

Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org

Close-up of underside of the infected areas which look more like discrete spots.

downy mildew (<em>Pseudoperonospora cubensis</em>) sign on watermelon (<em>Citrullus lanatus</em>)

Jason Brock, University of Georgia, Bugwood.org

downy mildew (Pseudoperonospora cubensis) sign on watermelon (Citrullus lanatus)

Lower surface of cucumber leaf reveals water-soaked tissue and pathogen sporulation

Gerald Holmes, Strawberry Center, Cal Poly San Luis Obispo, Bugwood.org

Lower surface of cucumber leaf reveals water-soaked tissue and pathogen sporulation

downy mildew (<em>Pseudoperonospora cubensis</em>) symptoms on cantaloupe (<em>Cucumis melo Cantalupensis Group</em>)

Jason Brock, University of Georgia, Bugwood.org

downy mildew (Pseudoperonospora cubensis) symptoms on cantaloupe (Cucumis melo Cantalupensis Group)

downy mildew (<em>Pseudoperonospora cubensis</em>) symptoms on squashes (general) (<em>Cucurbita pepo</em>)

Jason Brock, University of Georgia, Bugwood.org

downy mildew (Pseudoperonospora cubensis) symptoms on squashes (general) (Cucurbita pepo)

downy mildew (<em>Pseudoperonospora cubensis</em>) symptoms on watermelon (<em>Citrullus lanatus</em>)

Jason Brock, University of Georgia, Bugwood.org

downy mildew (Pseudoperonospora cubensis) symptoms on watermelon (Citrullus lanatus)

downy mildew (<em>Pseudoperonospora cubensis</em>) symptoms on gourd (<em>Cucurbita spp.</em>)

Jason Brock, University of Georgia, Bugwood.org

downy mildew (Pseudoperonospora cubensis) symptoms on gourd (Cucurbita spp.)