Powdery Mildew on Cucurbits
Leaves on 7 August 2004 from seedlings that were in an early spring-planted summer squash 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 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

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