Field day: Use of Protective Covers to Reduce Fungicide Usages in (Organic) Wine Grape Production in Virginia 5 September 2018 1 – 4 pm AHS AREC 595 Laurel Grove Rd.… Read more
At Winchester, the night time relative humidity has been still very high, close to 100%, in nearly every nights in the past three weeks. In addition, we have been observing… Read more
In the last several days, the nighttime relative humidity has been very high (>90%) and temperature has been in the upper 60s ~ lower 70s. This condition is favoring spore… Read more
Just a reminder on downy mildew management: although the month of July was dry until this week, many of us had a very wet early summer that fostered downy mildew… Read more
Thanks again for coming to today’s vineyard meeting. I learned quite a bit! Here are my handouts (sorry for not bringing enough today!!) 1) Sprayer calibration handout (will open a PDF… Read more
Most of us are about to finish the critical time when clusters are susceptible to infection by downy mildew, powdery mildew, and black rot. This critical time varies by varieties,… Read more
Here are my presentation materials from recent meetings. It will open a new window with a PDF file. 1) Slides from beginner’s workshop on 6 June 2018.2) Handout from the… Read more
There will be a meeting in the 23rd of June (Sat) at Rivah Vineyards at The Grove, Kinsale, Virginia. The meeting starts at 6:30 PM. If you are in the… Read more
A few people asked me about the specific location for tomorrow’s VVA summer technical meeting. The meeting will be held at Brown Bear vineyards (Formally Spring Hills), and the nearest… Read more
Powdery mildew colonies at the center of two leaves in the picture With this wet season, what we think most are downy mildew, black rot, Phomopsis, and Botrytis. Powdery mildew… Read more