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[compost_tea] grape PM



We started our CT program prebloom , first spray May 28th. We had 
very little downey mildew pressure this season so never used copper 
all season.

I let the next two sprays go too long 13 and 11 days. PM started to 
show in the Vinifera so we sprayed with sulphur. Good control till 
mid August when we saw a little more PM so sulphur again. I always 
resprayed CT 2-3 days after sulphur to re-establish microbes. 

No sulphur after August 20th. At harvest I found 2-3 "patches' of PM 
which affected only 1-2 vines each. In all cases the canopy was too 
dense and it was obvious that the spray could not have reached the 
inside leaves. 

Next season we will stick with a 7-9 day schedule. 



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