Disease event from yesterday (Update)

The second rain event on Sunday night ended up with about 10.5 hours of estimated wetness with an average of 70 F.  It was infection event for Phomopsis, black rot, downy mildew, and Botrytis.

Also, we had another warm and humid (RH >95%) night.  As I mentioned the other day, these conditions are favored by downy mildew pathogen to produce spores.

Related Posts

Leave a Reply

Your email address will not be published. Required fields are marked *

© 2025 Virginia Grape Disease Updates - Theme by WPEnjoy · Powered by WordPress