- did you know?
- Value-added agriculture is the processing, packaging, and/or marketing of agricultural commodities and farm resources in a way that allows a greater portion of the revenue derived from the product to be earned by the producer. Read more...
Have a question? Try asking one of our Experts
Why do cucumber, cantaloupe, and watermelon leaves develop yellow spots and blotches on them?
Downy mildew is a disease of cucurbits that causes numerous small, yellow spots on the upper leaf surface. Over time, the spots will darken and infected leaves will die. Beneath these yellow spots, the fungus Pseudoperonospora cubensis, cause of downy mildew, can often be found as whitish, fuzzy growth on the leaf undersurface.
Downy mildew is favored by cool-warm, moist, overcast weather. Use varieties that are resistant to this disease. Fungicides are available for the home vegetable garden if disease becomes severe enough to warrant chemical control. Contact your local Extension office for fungicide recommendations.
Have a specific question? Try asking one of our Experts
Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.
Did you find this page useful?
This resource area was created by the: community
Find an Extension Office
Enter your zipcode to find your local Extension office:
Resource Area Feeds
In This Resource Area
- Trees and Shrubs
- Flowers
- Fruits
- Vegetables
- Lawns
- Indoor Plants
- Landscaping
- Garden, Lawn, and Landscape Pests
- Soils and Composting
- Master Gardener
Comments
Subscribe to this page's comments
Post a comment about this topic