Disease risks from April 29-30

The total hours of wetness was about 18h with the average temperature at 50-56F.  It was long and warm enough for both Phomopsis and black rot.  Also, these spring rains… Read more

Disease risks from the 24th

I was out of town, and I did not realize it, but Winchester area received precipitations from a thunderstorm on the night of the 24th.  Since relative humidity was not… Read more

Fungicide Workbook 2013 version

Here comes 2013 version of “Workbook for Developing an Effective Fungicide Spray Program for Wine Grapes in Virginia“.   Although I finished it a few weeks ago, and used in… Read more

Bud break 2

Both Chardonnay and Merlot are near 100% bud break as of today.  At this point, one disease to be considered is Phomopsis cane and leaf spot.  If you have a… Read more

Bud swell / bud break…

The two hot days we had pushed things quickly.  Our Chardonnay buds are swelling and some are even broke.  Our Merlot is bit behind, but not by much.  Cab sauvignon… Read more

Fungicide guideline for non-bearing grapevines

It looks like things are finally warming up!  We will see how it will go next week. I updated my spray guide for non-bearing grapevines.  This guide also contains basic… Read more

Topsin-M application for wound protection

A few people asked in about Topsin-M application for pruning wound protection against Bot canker, so, here is my old post about it.  You can also download a special label… Read more

Employment opportunity (update)

We are seeking a postdoctoral scholar who is interested in working with biology of ripe rot pathogen.  If you are interested in, please apply through https://listings.jobs.vt.edu (posting SR0130030). Read more

Dr. Derr’s presentation

I just added Dr. Derr’s presentation from the IPM meeting, please see the posting below. Read more

Handouts from IPM workshops

Thank you for those of you attended our IPM meeting at Stone Tower Winery despite of cold weather!  Also, we really appreciate the great hospitality of Mike, Kristi, Bryan, and… Read more
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