A thunderstorm went through Winchester area yesterday evening, resulted in 12+ hours of wetness (on going) with an average temperature of near 70F.  This most likely to be resulted in risk event for downy mildew, black rot and Botrytis.

However, please note that the risk of black rot (especially on clusters) should be low because vines are about to be done (or already done) with their critical period for cluster infection.  (Plus, if you have not seen much black rot until this point, the risk is low too.)  The same goes with downy mildew cluster infection, but downy mildew can still infect leaves, especially the young ones.

People in the south and some early varieties in the north is approaching bunch closure.  This is one of application timing for Botrytis so that we can get the material to the inside of the clusters.