Those grapes again

United Kingdom

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.

15 Feb, 2009

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grapes

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Sarraceniac

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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