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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