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Ash leaf damage

Posted by hortster 6A southcentral KS (My Page) on
Sat, Sep 3, 11 at 15:13

I found this today on a tree that has been in the yard for over 15 years. It is 'Autumn Purple' ash (Fraxinus americana 'AP'). I have seen all of the typical maladies - flatheaded apple borer, ash/lilac borer, eastern twig borer (no EAB yet!), ash flower gall mite, etc. but this is the first time for this leaf mining insect. Two things that may or may not play on this - the damage seems much more prevalent on the north side of the tree (both pix from that side) and lowest, most shaded foliage; also I spotted two or three extremely fast black gnat like insects about 3/16" long. They were speedy both flying and leggin' it across the foliage.
Any ideas? TIA.
hortster

Photobucket
Photobucket


Follow-Up Postings:

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RE: Ash leaf damage

Rather than leaf miner, perhaps a small chewer which removed the surface cells. The exposed tissue is brown. So, whatever is responsible, is now gone.


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RE: Ash leaf damage - aha; found it!

Amazing. Used search phrase "ash leaf beetle" and that's what it is! Technical name leaf beetle is Octotoma plicatula

from forestryimages
http://www.forestryimages.org/browse/detail.cfm?imgnum=3067039

Here is a link that might be useful: ash leaf beetle damage


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RE: Ash leaf damage - now the beetle

http://bugguide.net/node/view/509121

Here is a link that might be useful: the beetle


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RE: Ash leaf damage

Good call, Jean! What a weird little beetle. I don't think I've ever seen one nor have I ever seen such damage.


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RE: Ash leaf damage

Hey, thanks, Jean. Certainly an ugly little critter. 'Twas a new one to me!
rhizo - the damage is pretty extensive and highly noticeable, although I'm sure it won't hurt the tree. It will be interesting to see if it returns next year.
hortster


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RE: Ash leaf damage

I rather doubt it will damage the tree, especially as it's almost time for the leaves to fall on their own.


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