Ash leaf damage

hortster(6a, southcentral KS)September 3, 2011

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

Thank you for reporting this comment. Undo
jean001a(Portland OR 7b)

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.

    Bookmark   September 3, 2011 at 4:26PM
Thank you for reporting this comment. Undo
jean001a(Portland OR 7b)

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

    Bookmark   September 3, 2011 at 4:29PM
Thank you for reporting this comment. Undo
jean001a(Portland OR 7b)

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

Here is a link that might be useful: the beetle

    Bookmark   September 3, 2011 at 4:31PM
Thank you for reporting this comment. Undo
rhizo_1 (North AL) zone 7

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

    Bookmark   September 3, 2011 at 11:19PM
Thank you for reporting this comment. Undo
hortster(6a, southcentral KS)

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

    Bookmark   September 4, 2011 at 11:53AM
Thank you for reporting this comment. Undo
jean001a(Portland OR 7b)

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

    Bookmark   September 4, 2011 at 7:14PM
Sign Up to comment
More Discussions
Spots on my apple tree leaves
Hi, Spots have been appearing on my new apple trees....
nat9510
sudden black stains on indoor plant with insects
These black stains appeared suddenly on an indoor plant....
patriiiiiiiiiick
Tomato disease
My tomato is under attack. It looks like both insects...
garf_gw
Weird white stuff growing on my plants.
I've noticed weird stuff growing & spreading on...
Cheryl Tan
Tomato Leaf Disease
The tomato disease has begun here in Miami. Does this...
garf_gw
© 2015 Houzz Inc. Houzz® The new way to design your home™