Skip to main content

Jan-Feb 2010 Viticulture Notes

2010 January - February issue of Viticulture Notes is published. There is a section of grape pathology too. Viticulture Notes and other seasonal information is distributed from our viticulturist Dr. Tony Wolf through the email. If you have not been subscribing to Tony's email list, please let me know so that we can add your name to the list.

Since out website is in the process of renovation, this issue of Viticulture Notes has not been uploaded yet. In the mean time, I uploaded here for your convenience.

I just came back from a meeting in Tennessee where I was invited to give talks about grape disease management (Tennessee Horticultural Expo). I had a good time meeting with new people. Tennessee's wine industry is smaller than that of ours, but it's growing strong. I hope we can continue communicating each other because we share similar growing conditions, especially in the southern VA and eastern TN.

Comments

  1. Dr. Nita,
    I had the pleasure of attending one of your sessions in Nashville at the Horticultural conference. I found your session to be very informative; much so I'm now for the first time trying to develope my own spray schedule using your spray guide lines and notes as an example.

    One problem I'm having is locating suppliers of some products; esp the Phosphorous and Potassium salts. Are you aware of any good retail sources? My area of coverage is very small (less than 1 acre).

    Thanks!

    Pat

    ReplyDelete
  2. Hi Pat,
    Since you are dealing with small area, you may want to try local retail stores such as Southern States, or local co-op. They may carry chemicals in small quantity. Also, if you take a look at the table for home garden materials (a link is on your right), a company Monterey (http://www.montereylawngarden.com/) is supplying Agri-Fos and Bi-Carb which are Phosphorous acid and Potassium bicarbonate, respectively. You should able to find them in one of stores or in their on-line stores.

    Good luck with your up-coming season!
    Mizuho

    ReplyDelete

Post a Comment

Please leave your comment here. In order to avoid spam messages, l moderate comments, thus it may take a few hours for your comment to be posted on the page.

Popular posts from this blog

Disease risks from yesterday's rain

Winchester area received precipitations from thunderstorms yesterday.  It started around 3:30PM and lasted until 7:00PM.  The actual amount of precipitation was not high (0.05 in) compared with other northern VA regions where a severe thunderstorm warning was issued, but since the ending part of the thunderstorm hit during the evening, the relative humidity was high (>90%) until 2 AM or so.  Thus, it accounted for 11.5 hours of wetness with the average temperature of 73F.  It was warm and long enough for Phomopsis, black rot, and downy mildew. We are still having chances of rain (40-60%) until Monday.

Recent downy mildew risk events

 It seems that several rain events have happened over the course of the past two weeks or so. Here is a summary of recent downy mildew risk events, based on the NEWA stations and DMCast. Bristol, VA Fifteen days with potential DM infection event(s) since Sept 1. The latest event happened last Sunday. Floyd, VA Eleven days with potential DM infection event(s) since Sept 1. The last event happened last Friday. Charles City, VA Twelve days with potential DM infection event(s) since Sept 1. The latest event happened yesterday. Central VA Since there was a wide variation among stations, I am listing several around Central VA. Tyro, VA Nine days with potential DM infection event(s) since Sept 1. The latest event happened yesterday. Red Hill and Crozet, VA Only one day with potential DM infection event(s) since Sept 1. Olympic Lake Thirteen days with potential DM infection event(s) since Sept 1. The latest event happened last Sunday. Washington, VA Eight days with potential DM infection e...

EPA is reviewing captan

Captan, which we use extensively to manage downy mildew, Phomopsis, ripe rot, and other grape diseases, is currently under review by the EPA. In order to keep captan as one of our tools to control grape diseases,  please respond to the EPA's registration review page to post your comment  (will open the EPA page). With increasing cases of fungicide resistance with newer products in our region, it is very important for the majority of commercial grape growers located east of the Rockies to keep older multi-site materials such as captan to be used as a backbone of the spray program.  Also, please forward the message to other producers and stakeholders who should respond to the need for this fungicide in our industry.