Monday, May 2, 2011

Disease risks from yesterday's rain

We received about 0.02 inches of rain at Winchester.  Showers came in and out since around 1:40 PM until 5:00 PM (3 hrs 20 min).  The air was dry during the time of rain (< 90% RH), and the average temperature was 55F.  It was not long enough for either Phomopsis or black rot.  Although the temperature was lower than the optimal, it was probably warm and long enough for downy mildew.

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