spraying grapes for powdery mildew

tim45z10May 6, 2013

Should I spray for mildew before there is any sign, or wait until I see it?
Thank you for your help.

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bart1(6/7 Northern VA)

Always spray before you see any mildew or rot. Once you see it, it's too late.

The sprays are preventative........they stop mildew from forming, but once it's there, they don't stop or kill it.

Also, spray before a rain, not after, for the same reason. You want the plants to be coated with spray (protected) before the rain comes.

    Bookmark   May 6, 2013 at 7:36AM
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fruitnut Z7 4500ft SW TX

UC Davis is the expert connection on all things fruit pest related in CA.

Here is a link that might be useful: grape PM

    Bookmark   May 6, 2013 at 9:54AM
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