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Decade long upsurge in mutations associated with pyrethroid resistance in bed bug populations in the USA

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Abstract

Over the past three decades, the bed bug Cimex lectularius has resurged as a prominent indoor pest on a global scale. Knockdown-associated insecticide resistance (kdr) involving the voltage-gated sodium channel, targeted by organochlorine and pyrethroid insecticides, was first reported in C. lectularius within a few years of the widespread use of dichlorodiphenyltrichloroethane (DDT) and has been implicated as a significant factor contributing to the species’ recent resurgence. Since then, selection with pyrethroid insecticides has intensified, yet little is known regarding its short-term impacts on the frequency of kdr-associated mutations. Here, we report temporal changes in the frequencies of three kdr-associated mutations in C. lectularius populations collected across the USA from two time periods, sampled approximately a decade apart. The results reveal a significant increase in the frequencies of kdr-associated mutations over this period and the absence of the insecticide-susceptible genotype in recent collections. Furthermore, a significant transition was observed toward infestations possessing multiple kdr-associated mutations. These findings suggest that the persistent use of pyrethroid insecticides over the past decade continues to impose strong selection pressure on C. lectularius populations, driving the proliferation of kdr-associated mutations. They demonstrate that, if unabated, strong anthropogenic selection can drive the rapid evolution of adaptive traits.

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Acknowledgements

We thank all pest management companies for providing samples (electronic supplementary material, Table 3) and Rick Santangelo for the management of the 2005–2009 samples.

Funding

Funding was provided by competitive grants from USDA-NIFA (AFRI 2008–35302- 04565), NSF (DEB-1754394), Oklahoma Center for the Advancement of Science and Technology (HR13-211 and HR20-142), the National Pest Management Foundation, the Blanton J. Whitmire endowment at North Carolina State University, the Urban Entomology Endowment at Texas A&M University, and student research grants awarded by The University of Tulsa.

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Correspondence to Warren Booth.

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The authors declare no conflicts of interest.

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Communicated by Ruth Muller .

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Lewis, C.D., Levine, B.A., Schal, C. et al. Decade long upsurge in mutations associated with pyrethroid resistance in bed bug populations in the USA. J Pest Sci 96, 415–423 (2023). https://doi.org/10.1007/s10340-022-01505-4

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  • DOI: https://doi.org/10.1007/s10340-022-01505-4

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