Thunderstorms went through yesterday in Winchester area; however, air was dry (RH<80% even during the rain), and the sun came up soon after that, thus, leaves were probably dry soon after the rain. It was probably not a disease risk event. We are expecting to see more rain this afternoon.
Winchester area received precipitations from thunderstorms yesterday. It started around 3:30PM and lasted until 7:00PM. The actual amount of precipitation was not high (0.05 in) compared with other northern VA regions where a severe thunderstorm warning was issued, but since the ending part of the thunderstorm hit during the evening, the relative humidity was high (>90%) until 2 AM or so. Thus, it accounted for 11.5 hours of wetness with the average temperature of 73F. It was warm and long enough for Phomopsis, black rot, and downy mildew. We are still having chances of rain (40-60%) until Monday.
Birds damage is also starting to occur.
ReplyDeleteThat's a good reminder! Bird damages can end up with Botrytis and other late season rot.
ReplyDeleteI would love to see more images of your grapevines throughout the process, just to compare mine with :)
ReplyDeleteHi Andrew,
ReplyDeleteI think that's a good idea. I will try to put as much pictures as possible!