Fuzzy growth on leaves of pin oak - photos

christie_sw_mo(Z6)June 7, 2010

Is this caused by an insect or disease?

click to enlarge:

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jean001(z8aPortland, OR)

Not certain because I'm not in your region. But I bet that's a leaf gall. If so, not damaging other than unsightly.

But let's wait for someone else to comment. Perhaps rhizo?

    Bookmark   June 7, 2010 at 1:21PM
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hortster(6a, southcentral KS)

I think jean001 is on the right track. You might google "vein pocket gall" and compare.
hortster

    Bookmark   June 7, 2010 at 1:51PM
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rhizo_1 (North AL) zone 7

Doesn't really look like the pocket gall to me. But I don't have any alternate suggestions right off the bat. Wish I could dissect them to see what the heck is inside, lol!

    Bookmark   June 8, 2010 at 4:26AM
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jean001(z8aPortland, OR)

Well, OP could do that and then post an image. Right?

    Bookmark   June 8, 2010 at 1:44PM
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christie_sw_mo(Z6)

I don't know if this will help but I broke one open and took a picture.

I saw a couple very tiny black flies but I'm not sure they came out of it.

    Bookmark   June 10, 2010 at 10:24AM
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