powdery mildew treatment for grapes? (forum)

denise starts with ...
Hi everyone,
last year I lost my grape crop to powdery mildew. This year there has been no signs of mildew so far, but I'm not sure if I should take preventative action. I have cut back the leaves to improve air flow, but should I spray as well? If anyone has any ideas for organic treatments, I'd love to hear them.
Cheers
Denise

Time: 5th December 2009 12:43pm

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About the Author denise5
melbourne
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JUJUBE FOR SALE IN MELBOURNE says...
Hi Denise,

I was told to mix 1 part of full cream milk and 10 parts of water and spray as preventative action. I am going to try this season on my Asian melon vines.

Good luck.


Time: 5th December 2009 1:44pm

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Doug says...
I have tried for over 10 years to stop powdery mildew. I have tried all sorts of fungacides and organic techniques. was on the verge of pulling them out when I spoke to an old Italian and he said just puff them with garden sulphur. I did that every few weeks and after rain. I had so many bunches I couldn't give them away and even the bird left them alone because of the sulphur dust. i juiced about 30x300ml plastic water bottles and froze them. I still drink it every few days and it is great. Never never give up

Time: 9th June 2011 4:41pm

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Charles cant spell says...
Yup well pruned, good ventilation, if possible avoid over watering, and if required a puff of sulphur after rain spells to keep mildew under control.


Time: 10th June 2011 2:44am

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About the Author Charlesstillcantspell1
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Brad says...
Agreeing with advice above I have also noticed a few people with gardens more established than mine say that mildew problems almost disappeared as soils improve. I've read that uh oh memory failure potassium or phosphorous helps plants against it

Time: 11th June 2011 10:21am

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Original Post was last edited: 11th June 2011 10:22am

About the Author Brad2
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amanda says...
Probably potassium Brad - it really helps to toughen things up - including lawns :) Thanks Doug - I have gone with the 1/10 milk spray but it's more of a preventative than a cure apparently - and some years I don't get p.mildew anway..(so all that work spraying for nothing!!) We had a very humid summer this year and NO powdery mildew....!? I don't understand it sometimes - 2yrs ago I had major p.mildew...but it was cooler and we had a fair bit of dew (being right next to the ocean doesn't seem to help with that..??)

Time: 12th June 2011 10:55pm

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About the Author amanda19
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