BACKGROUND: Bed bugs (Cimex lectularius) are blood-feeding insect pests with public health relevance. Their rapid evolution of resistance to pyrethroids has prompted a shift to combination products that include both a pyrethroid and neonicotinoid insecticide. Insecticides have both a direct impact on mortality and an indirect effect on behavior. Thus, we assessed the sublethal effects of a widely used combination product containing β-cyfluthrin (a pyrethroid) and imidacloprid (a neonicotinoid), as unexpected behavioral changes after exposure have been known to affect efficacy of insecticides. RESULTS: We found that bed bugs exposed to sublethal doses of a combination product containing β-cyfluthrin and imidacloprid did not feed as effectively as untreated bugs. Their locomotion behavior was also reduced. However, aggregation in response to the presence of conspecific harborages was not affected by sublethal exposure. CONCLUSION: Bed bugs exhibit behavioral changes after sublethal exposure to a combination product that could affect pest management choices and outcomes. A reduction in host-finding efficiency and feeding could complement the lethal effects of the insecticide. Alternatively, reduced locomotion following exposure could limit ongoing contact with insecticide deposits. However, an overall reduction in movement indicates that treatments are unlikely to cause dispersal of bugs to adjacent dwellings.
|Number of pages||6|
|Journal||Pest Management Science|
|State||Published - Mar 1 2017|
Bibliographical noteFunding Information:
We would like to thank anonymous reviewers for their thoughtful comments which improved the quality and clarity of our manuscript. We thank Scott Bessin for technical assistance. This is publication No. 16-08-032 of the Kentucky Agricultural Experiment Station and is published with the approval of the Director. This work is supported by the National Institute of Food and Agriculture, US Department of Agriculture, Hatch Project KY008066.
© 2016 Society of Chemical Industry
- bed bugs
- pest control
- sublethal exposure
ASJC Scopus subject areas
- Agronomy and Crop Science
- Insect Science