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Powdery Mildew on Cucurbits
Leaves on 7 August 2004 from seedlings that were in a main-season pumpkin crop 9 days earlier. Based on powdery mildew severity on leaves treated with the QoI Flint, the DMI Nova, and the MBC Topsin M relative to the non-treated control leaf, strains of the pathogen resistant to these 3 fungicide groups were present at a moderate to high frequency in the field the seedlings were placed in.

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Link to the News Article "Guidelines  for  managing  cucurbit  powdery mildew  with  fungicides  in  2005"

Link to the Factsheet on Powdery Mildew of Cucurbits

Link to Photo Gallery of Powdery Mildew of Cucurbits