[MAIPC] Ailanthus Herbivory

[carolallen at erols.com]

Considering the genetic variation I see in the ailanthus trees in DC, I'd say this has too many of the key features to be anything else. Dirr allows petioles to range from 1/4 - 3/4". Some of the leaves even have the characteristic 'thumb". 


When ever identifying woody plants, buds will always be a more accurate feature than leaves. 

----- Original Message -----

From: paqinc at aol.com 
To: "Tim Maywalt" <temaywalt at gmail.com>, "Nathan Hartshorne" <nshartshorne at gmail.com> 
Cc: "MAIPC Listserve" <maipc at lists.maipc.org> 
Sent: Monday, July 5, 2021 5:43:12 PM 
Subject: Re: [MAIPC] Ailanthus Herbivory 



Aralia has a terminal leaf at the end of the compound frond; the leaf in her photo did not. The photo also shows fairly long petioles which rules out a lot of other compound leaved species…this one has me stumped. Is it a tree or a shrub? 

Pat Quigley 
1080 Quarry Hall Road 
Norristown, PA 19403 
office 610-584-1829 
cell 215-990-7279 


From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of Tim Maywalt 
Sent: Monday, July 5, 2021 4:59 PM 
To: Nathan Hartshorne <nshartshorne at gmail.com> 
Cc: MAIPC Listserve (maipc at lists.maipc.org) <maipc at lists.maipc.org> 
Subject: Re: [MAIPC] Ailanthus Herbivory 



Devil's walking stick ( Aralia spinosa). 







On Mon, Jul 5, 2021 at 4:31 PM Nathan Hartshorne < nshartshorne at gmail.com > wrote: 



What looks like tree of heaven, has similar bark, and is tree-sized? I will do some comparative looking. I only know the various sumacs and black walnut. 



On Mon, Jul 5, 2021 at 10:40 AM Richard Gardner < rtgardner3 at yahoo.com > wrote: 
<blockquote>




That is not Ailanthus because the compound leaf is not odd pinnate, the notches are wrong and it is too rough. 





On Monday, July 5, 2021, 01:06:57 PM EDT, Nathan Hartshorne < nshartshorne at gmail.com > wrote: 









The most likely one seemed to be the mite, except it's also called "leaf curl mite" not "patterned hole mite" so I'm still at a loss as to what could do such a distinctive look on all the leaves. Obviously it's not deer, and the moths seemed wrong too based on what little imagery I could find and general knowledge of feeding behavior (which I realize there must be more exceptions than moths I know) 




On Mon, Jul 5, 2021 at 9:19 AM Jackson, David Robert < drj11 at psu.edu > wrote: 
<blockquote>



Could be ailanthus webworm. 
https://en.wikipedia.org/wiki/Ailanthus_webworm 

Dave 

David R. Jackson 
Forest Resources Educator 
Penn State Extension-Centre County 
Willowbank Building, Room 322, 420 Holmes Street 
Bellefonte, PA 16823 
drj11 at psu.edu 814-355-4897(office) 
Forests and Wildlife Extension: https://extension.psu.edu/forests-and-wildlife 



From: MAIPC < maipc-bounces at lists.maipc.org > On Behalf Of Nathan Hartshorne 
Sent: Friday, July 2, 2021 7:29 PM 
To: MAIPC Listserve ( maipc at lists.maipc.org ) < maipc at lists.maipc.org > 
Subject: [MAIPC] Ailanthus Herbivory 


Anyone know what's eating this tree of heaven? 







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