*
Powdery Mildew (Uncinula necator) conditions
for infection occur
when there is at least 0.1" of
rainfall or 13 hrs of leaf wetness and > 50' F; spore germination
inhibited >95
F. Require 5-7 days cycle from infection
to conidial production under optimum condition.
Rainfall not required for release of secondary spores.
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