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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 high (60-70%), leaves did not stay wet for a long time.  (I could not see any measurable precipitation data from Winchester airport.  Maybe some errors of their instrument?)  Thus, there was no grape disease risk associated with the rain.

Looks like we may see some rains next week.  If you have issues with Phomopsis, it may be a good idea to think about protective application of a fungicide such as a mancozeb product.

Also, I uploaded an updated version of the workbook since I received some comments, including one from Dr. Anton Baudoin of our department ;) 
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Comments

  1. AnonymousMay 2, 2013 at 6:19 AM

    Hi Mizuho
    Picking up a low level (1% vines; ~ 1 damaged bud/shoot per vine)damage of bud
    "boring" and some green shoots cut where shoot and cane intersect. Sprayed carbamyl during wet/rain period (April 30, 10:30am)but still pick up new damage May 2. Please advise: are there visual images of flea beetle and cutworm damage online?

    ReplyDelete
  2. Mizuho NitaMay 3, 2013 at 1:40 PM

    Hi, Please check Doug's page on cutworm.

    http://www.virginiafruit.ento.vt.edu/cutwormsgrape.html

    Also Cornell has a nice page on grape flea beetle.

    http://nysipm.cornell.edu/factsheets/grapes/pests/gfb/gfb.asp

    ReplyDelete

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