On going disease risk event

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… Read more

Seasonal Disease Management Consideration toward the end of the season.

Finally, we are having relatively dry weeks!  Most of us are about to finish critical time where clusters are susceptible to infection by downy mildew, powdery mildew, and black rot. … Read more

Dews and humidity in the past few days

We have not received precipitation since the 21st, but every night since then has been humid.  Dews that formed 3-4 AM stayed until 9-10 AM in some days.  Once again,… Read more

Yet another rain events on June 21-22

Winchester area was rained out pretty much whole day yesterday, resulted in two wetness events, one with ~16 h of wetness with low 60F, and another one with ~7 hours… Read more

Disease risks from last night

A thundershower hit Winchester area around 6PM last night, resulted in 16 hours of wetness with lower 60F in average temperature.  It was disease risk event for black rot, downy… Read more

Disease risks from last few days, and a plan for next spray

Boy, what a week!Winchester area received about 17 hours of wetness with average temperature of 20 C (68F) on the 11th, 14 hours of wetness with average temperature of 22… Read more

Disease risk event from yesterday

The rain event started on the night of the 8th resulted in about 14 hours of wetness with about 65F in average temperature.  This was infection risk event for downy… Read more

Seasonal disease management reminders at bloom time

Many people in northern VA are about to see blooms (our Chardonnay vines are trace bloom as of June 2nd, the one on the picture is one of the few… Read more

On-going disease infection risk events

A quick update: A series of rain event since 5/29 around Winchester area produced two Phomopsis infection events and one black rot infection events.  Two consecutive humid nights probably promoted… Read more

Phomopsis and Downy mildew observed at Winchester AREC

We had a short shower event last evening; however, it was short and relative humidity did not stay high for a long time.  Thus, it was not a major disease… Read more
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