Thanks Tom and Stephan! Tom, I just wanted to confirm that in the scenario 
above the active green larvae and adult wraps we found are the same species? 
Thanks again for your insights!

Best,
Casey


Casey Oehler

Museum Technician – Museum Conservation Services / NPS History Collection

Harpers Ferry Center, National Park Service

304-535-6125 | casey_oeh...@nps.gov<mailto:casey_oeh...@nps.gov>

________________________________
From: 'bugman22' via MuseumPests <pestlist@googlegroups.com>
Sent: Wednesday, May 17, 2023 3:03:41 AM
To: pestlist@googlegroups.com <pestlist@googlegroups.com>
Subject: [EXTERNAL] Re: [PestList] Alaska Wood Boring Pest ID




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Group -

As a retired entomologist working with historic properties and museums over the 
past 45 years, I've run into your situation quite often, especially when it 
comes to log structures and outdoor wooden sculptures.

The scenario goes like this:

A wood-boring beetle lays eggs either in the pores of the wood or in checks and 
cracks.  The larvae then tunnel into the wood (usually feeding in the outer, 
sugary sapwood),  pupate just beneath the surface, and then the adult beetle 
chews its way out, leaving behind a small hole.  Most leave round holes, 
depending on the type of beetle,  The round holes may be small or large in 
diameter, depending on the type of beetle infesting the wood.  Flat-headed wood 
borers, Cerambycidae, leave oval holes.

Fresh holes are the color of newly-sawn wood.  In time, the holes age and 
become dark.  You are picturing dark, old holes.

Then a variety of wasps take advantage of these holes and use the galleries in 
which to raise their young.  They usually provision the galleries with 
paralyzed insects on which the larvae will feed until maturity.  When the adult 
wasp emerges, it flies from the hole, finds a mate, and the entire cycle begins 
again.

A common practice to prevent continuing infestation and possible rot from 
rainwater entering the holes, is to seal the holes with colored wax.  Wax 
pencils in varying colors are available from any well-stocked hardware store.

Tom Parker


-----Original Message-----
From: 'Oehler, Casey L' via MuseumPests <pestlist@googlegroups.com>
To: pestlist@googlegroups.com <pestlist@googlegroups.com>
Sent: Tue, May 16, 2023 7:45 pm
Subject: [PestList] Alaska Wood Boring Pest ID

Hello! We are looking for help identifying a wood boring insect found in an 
outdoor post in Southeast Alaska. We are waiting on wood identification of the 
post. Attached are pictures of the larvae, adults, and damage. Thanks!

Casey Oehler
Museum Technician – Museum Conservation Services / NPS History Collection
Harpers Ferry Center, National Park Service
304-535-6125 | casey_oeh...@nps.gov<mailto:casey_oeh...@nps.gov>

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