Lisa, Assuming these are American cockroaches, they're likely from the sanitary drains. Check all floor drains to ensure the traps are hydrated. If you're lucky, you just need to have those topped off periodically. Then, check other drains. In some cases, you may need to have the sanitary lines and vent stack checked for integrity. Good luck. -Rich
Richard J. Pollack, PhD HARVARD UNIVERSITY Environmental Health, Safety and Emergency Management (EHSEM) Senior Environmental Public Health Officer 46 Blackstone St. Cambridge, MA 02139 Office: 617-495-2995 Cell: 617-447-0763 www.ehs.harvard.edu richard_poll...@harvard.edu<mailto:richard_poll...@harvard.edu> Harvard T.H. Chan School of Public Health Instructor, Department of Immunology & Infectious Disease From: pestlist-ow...@museumpests.net [mailto:pestlist-ow...@museumpests.net] On Behalf Of Lisa Bruno Sent: Tuesday, October 04, 2016 10:59 AM To: 'pestlist@museumpests.net' <pestlist@museumpests.net> Subject: [pestlist] ? about cockroaches Dear List - My head of security has come to us with an issue. Apparently, they are being overrun with giant cockroaches (water bugs) in the basement and apparently it is starting to creep up to the first floor. There is no construction going on, and the café kitchen has apparently never been cleaner. Thoughts as to what a sudden influx of these pests might be indicating? Thanks in advance. Lisa Bruno Carol Lee Shen Chief Conservator
