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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