Abstract
Pyrethrum aerosol was disseminated each hour in the presence of separate groups of house flies, Musca domestica L., and Madeira cockroaches, Leucophaea maderae (F.), kept before and during tests under standardized conditions and on a schedule of 15 or 17 hours of artificial light alternating with 9 or 7 hours of darkness. Both species consistently demonstrated a circadian rhythm in susceptibility to the aerosol judged by the use of 2 endpoints-knockdown and death. The acrophase (crest) of susceptibility in both species occurred during the last quarter of the daily light span, about midafternoon.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
