What is this white stuff?

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JLEM Atascadero, CA Jun 12, 2010

I have seen some white on some of my squash plants, on the main stem near the base of the plant. Any idea what it is? Is it anything to worry about?

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sapphirestar19 Pearland, TX Jun 14, 2010

MIght be the beginnings of Squash Vine Borer damage. If your leaves are looking pretty limp by the end of the day, that's probably it. If that is the case, take a paring knife and make a slit lengthwise in the stem where the damage is to just above into the healthy plant tissue. You should see a little white grub. Pick him out and smoosh him. Then tape up the slit with either duct or floral tape. The plant will recover from the surgery if it is still pretty healthy. I had to do that on all of my plants (appx 15 of them) and they are all healthy again.

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HoneybeeNC Charlotte, NC(Zone 7b) Jun 15, 2010

If it's hot and humid where you are, it could be powdery mildew. It could also be squash vine borer as sapphitestar said. If it's either one, YES, it is something to worry about.

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