You start to see black rot now, so, what should you do?

I have received several emails about black rot recently.  With the frequency of rains we observed so far, it is not surprising to see small amount of black rot even… Read more

Handout from Loudoun county meeting

Looks like we have openings in the sky today and tomorrow.  What a wet year! Here’s a copy of handout from the extension meeting held at Loudoun county last week. … Read more

For this Saturday’s and next week’s rain events

Since we are expecting heavy rain event on Saturday, plus about to be done with the critical time for cluster infection by downy mildew, powdery mildew, and black rot (which… Read more

Handout from VVA summer technical meeting

Most of us are about to see the end of critical time for berry infection by black rot, powdery mildew, and downy mildew.  Please keep up as much as you… Read more

Bloom time fungicide considerations

The warm May pushed our vines forward rather quickly.  Many people in northern VA are about to see blooms (our 3-year old young Chardonnay vines are trace bloom), and I… Read more

More on fungicide (re)application timing topic

I posted general “rule of thumb” about application (or re-application) earlier this season.  Dr. Annemiek Schilder at Michigan State University recently published a very nice write up about it. She… Read more

Mealybugs are on its move too!

Today is the one of the days when you find many things in the vineyard!  Mealybugs (white one in the middle of the picture) are also observed, mainly at the… Read more

Updates on the previous post (Downy mildew)

On the previous post, I mentioned that “At this time of the season, what we typically recommend is either mancozeb or captan mixed with sulfur to protect young shoots and… Read more

Warm and wet weekend

Winchester area received a series of rain over the weekend, and it looks like we may see more coming in the next few days.  There were three days of low… Read more

Low Phomopsis risk

Two days of intermittent rain brought a low infection risk event for Phomopsis.  Also, these spring rain events can be precursor events for both downy and powdery mildew.  As noted… Read more
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