On their backs mean they are in the process of dying either from a treatment if
you are doing an exterior perimeter spray, other treatments in the building, or
just from them desiccating. At 55% they should not get "settled in" unless
there are micro climates due to leaks or moisture issues. Sounds like they may
be coming down into the space from an electrical or plumbing chase. If there
are any floor drains make sure they are not dried up and rehydrate if they are.
You can also place more sticky traps around to maybe pinpoint a location of
where they are getting in. JTV
Joel Voron Colonial Williamsburg Foundation
Conservation Dept.
Integrated Pest Management Specialist
Office 757-220-7080
Cell 757-634-1175
E-Mail jvo...@cwf.org
________________________________________
From: pestlist@googlegroups.com <pestlist@googlegroups.com> on behalf of mc6780
<mc6...@princeton.edu>
Sent: Thursday, August 11, 2022 11:16 AM
To: MuseumPests
Subject: Re: [PestList] Cockroach Treatment - Harmful to Library Collections?
[CAUTION: This message originated from outside the Foundation. Do not click
links, open attachments or take action unless you know the contents are safe]
Relative humidity is pretty steady around 55% and both were found in sticky
traps.
Just out of curiosity for future reference, how does this differ from finding
them on their backs or running?
On Thursday, August 11, 2022 at 11:11:18 AM UTC-4 jvo...@cwf.org wrote:
What is the relative humidity of the space and were they found on their backs,
running, or in sticky traps?
Joel Voron Colonial Williamsburg Foundation
Conservation Dept.
Integrated Pest Management Specialist
Office 757-220-7080<tel:(757)%20220-7080>
Cell 757-634-1175<tel:(757)%20634-1175>
E-Mail jvo...@cwf.org
________________________________________
From: pest...@googlegroups.com <pest...@googlegroups.com> on behalf of Margaret
Canfield <mc6...@princeton.edu>
Sent: Thursday, August 11, 2022 10:25 AM
To: pest...@googlegroups.com
Subject: Re: [PestList] Cockroach Treatment - Harmful to Library Collections?
[CAUTION: This message originated from outside the Foundation. Do not click
links, open attachments or take action unless you know the contents are safe]
Hi Joel,
All interior spaces that are underground. One of the spaces has an atrium that
sticks out aboveground in a grassy/rocky area.
Margaret
________________________________
From: pest...@googlegroups.com <pest...@googlegroups.com> on behalf of Voron,
Joel <jvo...@cwf.org>
Sent: Thursday, August 11, 2022 10:11 AM
To: pest...@googlegroups.com <pest...@googlegroups.com>
Subject: Re: [PestList] Cockroach Treatment - Harmful to Library Collections?
Location geographically?
Any live plants in the space?
Any exterior mulch beds near doors?
Joel Voron Colonial Williamsburg Foundation
Conservation Dept.
Integrated Pest Management Specialist
Office 757-220-7080<tel:(757)%20220-7080>
Cell 757-634-1175<tel:(757)%20634-1175>
E-Mail jvo...@cwf.org
________________________________________
From: pest...@googlegroups.com <pest...@googlegroups.com> on behalf of mc6780
<mc6...@princeton.edu>
Sent: Thursday, August 11, 2022 10:08 AM
To: MuseumPests
Subject: [PestList] Cockroach Treatment - Harmful to Library Collections?
[CAUTION: This message originated from outside the Foundation. Do not click
links, open attachments or take action unless you know the contents are safe]
Hi all,
I cannot get the MuseumPests site to work right now so I thought I would reach
out to your expertise with some questions. I have recently found two Oriental
cockroaches in collection spaces, and I am nervous about potential damage to
collections. That being said, I also want to know more about how cockroach
treatments affect library collections. Does anyone know if there has been any
research done on various treatments for cockroach extermination and whether any
of these are detrimental towards library/museum objects?
Thank you in advance!
All best,
Margaret Canfield
Conservation Technician
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