Cucurbit Downy Mildew

— Written By

A foliar, fungal like disease of cucumbers, cantaloupe, melons, squash and pumpkins, Pseudoperonospora cubensis generally arrives in North Carolina in May or June and escalates through fall.

Cucurbit downy mildew , Top of leaf image by Gerald Holmes

Cucurbit downy mildew, Top of leaf
image by Gerald Holmes

Minimize cucurbit downy mildew damage by:

  • Keeping leaves dry when possible:
    • Water the soil rather than the plant
    • Use drip irrigation
    • Water early in the day
    • Space plants to allow air circulation.
  • Plant early in the season to harvest before fall when disease levels are highest in North Carolina.

At present, no resistant varieties are available.

More Information and Images

If you're a North Carolina resident with a question about a topic on this site, your local N.C. Cooperative Extension office can help.

Contact your local county center.

Written By

Lucy Bradley, N.C. Cooperative ExtensionDr. Lucy BradleyUrban Horticulture Professor and Extension Specialist Call Dr. Lucy E-mail Dr. Lucy Horticultural Science
NC State Extension, NC State University
Updated on Nov 10, 2020
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