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Something's Killing My Cabernet!!!

Posted by greenmiddlefinger 10a (My Page) on
Wed, Jun 12, 13 at 17:06

Please help! I'm at a loss. Something is killing my Cabernet grapes. I noticed some sort of mildew and used copper fungicide to correct the problem but either its not working, it's what's now doing this to them, or I have terrible luck a d this is a non related third issue! Any advice would be appreciated!


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RE: Something's Killing My Cabernet!!!

  • Posted by fruitnut z7b-8a,4500ft SW TX (My Page) on
    Thu, Jun 13, 13 at 20:33

Did you see the white fungus on the leaves, stems, or fruit? Because I can't. But powdery mildew is a good guess especially in southern CA, the only 10a climate where one can grow grapes easily.

If it is mildew you may need a better fungicide. I don't think copper is the right choice for mildew. It could also just be dryness or low nitrogen since it seems mainly on the older leaves.

UC Davis has excellent info on this and any other pest of fruits, see below.

Here is a link that might be useful: powdery mildew


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