Wednesday, July 11, 2012

Disease risks from this weekend

Rain fall in 8-9 July resulted in 15 hours of estimated wetness event with an average temperature of 72F.  It was infection event for Phomopsis, black rot, Botrytis, and downy mildew.

Due to a series of rains we received over last two weeks or so (including a few nasty storms), I started to see downy mildew development in our experimental vineyards.  Please keep eye on them.  We are most likely done with the critical time for berry infection, but it can still cause disease on leaves.

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