We received a showed yesterday afternoon, and it resulted in about 7.5 hours of estimated wetness duration with an average temperature of 65.5F around Winchester area. It was an infection event for downy mildew and Botrytis, and it was a potential infection event for black rot and Phomopsis (Note: these two diseases are of relatively minor importance at this point of the season). Once again, I see the risk of downy mildew remains high. Please scout your vineyards (especially for younger leaves) often to catch early development of downy mildew.
(note: the East of us received a considerable rain over the weekend,
but we did not. i.e., other Northern VA area might have one more risk