Symptoms
| Powdery mildew: Erysiphe cichoracearum Symptoms It attacks muskmelons, squash, cucumbers, gourds, and pumpkins. It is evident as a superficial, powdery, grayish-white growth on upper leaf surfaces, petioles, and even main stems of infected plants. Affected areas turn yellow then brown and die. In dry seasons, powdery mildew can cause premature leaf drop and premature fruit ripening. Some early disease results from spores produced on over wintering cucurbit debris or weeds but the major source of disease inoculum is windblown spores from southern crops. Warm, dry weather conditions favor the development of powdery mildew. Management Powdery mildew can be controlled by application of Wettable sulphur @ 0.2%. |
- It attacks muskmelons, squash, cucumbers, gourds, and pumpkins.
- It is evident as a superficial, powdery, grayish-white growth on upper leaf surfaces, petioles, and even main stems of infected plants.
- Affected areas turn yellow then brown and die.
- In dry seasons, powdery mildew can cause premature leaf drop and premature fruit ripening.
- Some early disease results from spores produced on over wintering cucurbit debris or weeds but the major source of disease inoculum is windblown spores from southern crops.
- Warm, dry weather conditions favor the development of powdery mildew.
Management
- Powdery mildew can be controlled by application of Wettable sulphur @ 0.2%.