Scouting Guides for Problems of Vegetables
Scouting Guides for Problems of Vegetables

Scab of Cucurbit Crops

Scab of Cucurbit Crops

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Scab (Cladosporium cucumerinum) may appear on cucumber, muskmelon, pumpkin, and squash. Leaves and stems can be affected, but the greatest losses occur when fruit are infected. On fruit, small, sunken spots develop that may be covered with an olive-green mass of spores. Secondary pathogens may invade lesions, leading to fruit rot.  

Cucumber scab.

Cucumber scab.

(Photo: Mary Ann Hansen, Virginia Tech, Bugwood.org)

    

Management:

  • Resistant varieties
  • Pathogen-free seed
  • Crop rotation
  • Fungicides
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Contact Information

201F Plant Science Building 1405 Veterans Drive Lexington, KY 40546-0312