I just want to remind you about the risk of downy mildew remains high this week. Downy mildew prefer to produce spores under dark and humid conditions. We experienced a… Read more
I think many of you are either harvesting or getting ready for it. We harvested our Chardonnay and Merlot yesterday. (Of course most of them are damaged due to our… Read more
A rainy weekend brought our area two estimated wetness periods (19h with 73F, and 20h with 64F), plus additional 30h+ hours of high humid condition (RH>90%) (note: some of you… Read more
Here’s some of downy mildew symptoms (on Vidal). 1) On upper leaf 2) Underside close-up 3) On young berries 4) Up-close and personal You can find more pictures of downy… Read more
Boy, it has been a rainy month of September!If you are subscribing to Mark Chien’s “Wine Grape Information from Penn State”, you probably seen this, but here’s a link to… Read more
I have received several emails and phone calls regards to downy mildew and Botrytis last week. Also, some people are struggling with powdery mildew. Here are general options against these… Read more
At Winchester a series of rain started around 11:40 am and lasted until 6:40 pm resulting in 0.1 inches of precipitation. The average temperature during this period was about 50.5… Read more
I’ve been in and out of my office with my leaf roll survey project, and it has been bit difficult to frequently update the blog. Also, at this point, not… Read more
The thunderstorm on 7/01/09 lasted a little over an hour (0.73 inches); however, RH remained high for about 9 hours with an average temperature of 65F. Thus the event was… Read more
At Winchester, we had light rain events during the night of 6/12/09, but it was short events and the relative humidity was low (80% or so), thus it probably did… Read more