Abstract
Abstract Adults of the psocid Liposcelis bostrychophila Badonnel were exposed to atmospheres containing 35% and 55% CO2 for 30 generations to select strains resistant to high CO2 content (HCC). Selection pressure was maintained at around 70% of mortality. At the 30th generation, comparison of sensitivities between the selected strains (HCC1 and HCC2) and the original susceptible strain (MA‐S) revealed a resistance factor (RF) at the 50% mortality level (LT50) of 4. 6‐and 5. 3‐folds, respectively. Throughout the selection process, log‐time against probit‐mortality lines remained roughly parallel and the slopes remained lower than that of MA‐S strain until the last generation. It is inplied that the genetic potential of L. bostrychophila to develop resistance to CO2 was not exhausted until the 30th generation. Removal of selection pressure for 5 generations from 2 sub‐populations of two selected strains from the 25th generation caused significant reduction in resistance. In the absence of MAs exposure, the two selected strains (HCC1 and HCC2) possessed the fitness defect. HCC1 and HCC2 were calculated by R0 to have a fitness value of 0. 52 and 0. 45 relative to MA‐S.
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.
