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Those grapes again

United Kingdom Gb

Thanks for all your replies regarding my mouldy grapes. I think it is downy mildew. I do remove all the old leaves, and last year thoroughly cleaned all the greenhouse. I want to try Bordeaux mixture, and Gishurst treatment too, but I do not know HOW or WHEN! Help please.




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Hi again Ros. Bordeaux mixture can be used at full strength all winter and weakened form when dormancy is broken. For real details go to the U. of California site here:

http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7481.html

DrBob will know more about Gishurst treatment than I do so I'll wait for him to pick this up. If he misses it just click on his name in the other question and send him a personal message.

John.

16 Feb, 2009

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