Yoshiko, I anticipate that the millipedes are coming from that garden and slipping under the door. You could try to install brush sweeps on the door bottom. If they reach to the threshold below and extend fully across the door, they’ll likely prevent some – or many – from entering.
Reducing RH inside may not prevent more from entering, but it will hasten their demise. They’ll simply desiccate more rapidly, and you may find their carcasses closer to the exterior doors. Consider deploying glue traps along the interior wall on either side of door. You can make them less visible to people by hiding them behind or under a chair or small table. I doubt they’re attracted to library materials. Millipedes tend to feed upon moist vegetable matter. They may wander onto books or other library materials, but likely won’t cause damage unless the pages are wet. If that were the case, you’d have far more significant problems there. Best regards, Rich From: pestlist@googlegroups.com <pestlist@googlegroups.com> on behalf of Y. Kondo <yoshiko.kondo.conservat...@gmail.com> Date: Sunday, June 2, 2024 at 10:50 AM To: pestlist@googlegroups.com <pestlist@googlegroups.com> Subject: Re: [PestList] millipedes Hi Richard Thanks. As you mentioned, the basement of renewed library has access to the court with garden. The library tried to seal the access door but the invasion still continue. So maybe we should find out every small space where the invaders can penetrate... Keeping low RH can help to stop invasion? I am wondering if they are not be attracted by the library materials (they do not eat cellulose, adhesive, leather ecc. right?), whey they want to enter inside building? Thanks a lot Yoshiko Il giorno dom 2 giu 2024 alle ore 15:45 Pollack, Richard J <richard_poll...@harvard.edu<mailto:richard_poll...@harvard.edu>> ha scritto: Yoshiko, Most often, millipedes invade a building via gaps beneath exterior doors or around windows or non-sealed utility penetrations. They may also thrive indoors in basements or other sites where is it humid and cool, such as within or around sumps, floor drains that lead to dry wells or the soil, and in overly watered plant pots. As Joel mentioned, rains may drive millipedes (and other creatures) indoors. -Rich Richard J. Pollack, PhD Senior Environmental Public Health Officer Environmental Health and Safety (EH&S) | Harvard Campus Services 46 Blackstone Street., Cambridge, MA 02139 C: 617-447-0763 www.ehs.harvard.edu<http://www.ehs.harvard.edu> [A blue and black logo Description automatically generated]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.linkedin.com_in_richard-2Dpollack-2D6818997_&d=DwMFaQ&c=WO-RGvefibhHBZq3fL85hQ&r=GO7C3XN3WgFy2IP-bFBbnUs_CYntqj57Dprtl40-_KE&m=Z9cY2zSoPr92fukAaFsiV8UA-SjvhZGaxWkOPJVeINkTMIw0QmblBj8sCo5AKUr-&s=uFU-yd1GsTkDrEaFSuStE2bkli0x60_52V5a2rLqjHI&e=> From: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> on behalf of Y. Kondo <yoshiko.kondo.conservat...@gmail.com<mailto:yoshiko.kondo.conservat...@gmail.com>> Date: Sunday, June 2, 2024 at 9:40 AM To: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> Subject: [PestList] millipedes Hi all, I would like to ask if someone has experience with the invasion of millipedes. I will appreciate your advices. Thanks Best Yoshiko Yoshiko Kondo BOOK PAPER & PHOTOGRAPH CONSERVATION Studio: c/o Vecchio Conventino Via Giano della Bella 20 50124 Firenze Italy -- You received this message because you are subscribed to the Google Groups "MuseumPests" group. To unsubscribe from this group and stop receiving emails from it, send an email to pestlist+unsubscr...@googlegroups.com<mailto:pestlist+unsubscr...@googlegroups.com>. 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