Disease on crop
fungalDowny Mildew on melon
Pseudoperonospora cubensis (cucurbits) and others
Water mold (oomycete, not a true fungus) that thrives in cool damp conditions. Spreads rapidly through cucurbit and brassica plantings on wind-borne spores.
- Disease
- Downy Mildew
- Pathogen type
- Fungal
- Crop
- Melon
- Scientific name
- Pseudoperonospora cubensis (cucurbits) and others
Downy Mildew on melon
Detailed guidance for this section is being prepared. Check back soon.
Symptoms on melon
- ▸ Pale yellow angular spots on upper leaf surfaces (limited by leaf veins)
- ▸ Gray-purple fuzzy growth on leaf undersides in morning dew
- ▸ Rapid leaf collapse and defoliation
IPM controls
- ✓ Source resistant varieties (check seed catalogs annually as resistance changes)
- ✓ Avoid overhead watering, especially evening watering
- ✓ Wide spacing and trellising for airflow
- ✓ Preventive copper or phosphorous-acid sprays in high-risk regions
- ✓ Monitor https://cdm.ipmpipe.org for current spore-cloud advisories on cucurbits
Other crops affected by downy mildew
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