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Horticultural crops :: Vegetables:: Musk melon and Water melon

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%.

 


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