Oriental cockroaches do not have sticky pads on their feet. Therefore they cannot climb smooth vertical surfaces. They usually enter a building via unscreened floor drains, dry toilets, sinks, or showers. In libraries, I’ve seen bookshelves placed over top of floor drains, which are therefore dry. Time for thorough inspection. Tom Parker
> On Aug 11, 2022, at 12:01 PM, Voron, Joel <jvo...@cwf.org> wrote: > > 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. 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