Here is a copy of grape disease updates presentation I have given at the VVA meeting. (It will open Google Drive, if you find the images to be blurry, please… Read more
I hope you are enjoying the VVA meeting. Here is my handout from the VVA meeting, just in case if you would like to have a color copy. I will… Read more
There is a supplemental label for the use of Luna Tranquility with wine grape (you can click this link to download. It will open Google Doc, but you can download… Read more
Happy New Year everyone! I hope we will have a nice season! Hopefully your vineyard did not get too cold this week. Temperature reading at our research station was about… Read more
It finally stopped raining, but we (Winchester area) are having an on-going wet event since 10/9/13. I counted >108 hours of wetness with an average temperature of 54F (ranging from… Read more
Rain on this Monday resulted in 10 hours of wetness with an average temperature of 62F. It was warm and long enough for both downy mildew and Botrytis. Once again,… Read more
Since 9/2 or so, we are observing dew events that were wet enough to make our leaf wetness sensor wet almost every night. Since our sensors were located about the… Read more
A rain event followed by high relative humidity (+28 hours of wetness in high 60F) created disease risk event for downy mildew and Botrytis on 8/28-29. Read more
A wetness event recorded yesterday was infection event for Botrytis and Downy mildew. Refer to yesterday’s post on spray choices. Please make sure to alternate mode of actions to reduce… Read more
Continuous rain and high relative humidity caused Botrytis and downy mildew infection risk events on the 14th, 17th, and 20th. At this point of the season, a phosphite (aka phosphonate… Read more