Insecticide resistance in the bed bug comes with a cost

Adaptation to new environmental stress is often associated with an alteration of one or more life history parameters. Insecticide resistant populations of insects often have reduced fitness relative to susceptible populations in insecticide free environments. Our previous work showed that three popu...

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Bibliographic Details
Published in:Scientific reports 2015-06, Vol.5 (1), p.10807-10807, Article 10807
Main Authors: Gordon, Jennifer R., Potter, Michael F., Haynes, Kenneth F.
Format: Article
Language:English
Subjects:
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Animals
Bedbugs - drug effects
Environmental stress
Fecundity
Female
Fitness
Humanities and Social Sciences
Imidacloprid
Insecticide Resistance
Insecticides
Insecticides - pharmacology
Life history
Male
multidisciplinary
Oviposition
Pesticide resistance
Science
Sex ratio
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Summary:Adaptation to new environmental stress is often associated with an alteration of one or more life history parameters. Insecticide resistant populations of insects often have reduced fitness relative to susceptible populations in insecticide free environments. Our previous work showed that three populations of bed bugs, Cimex lectularius L., evolved significantly increased levels of resistance to one product containing both β-cyfluthrin and imidacloprid insecticides with only one generation of selection, which gave us an opportunity to explore potential tradeoffs between life history parameters and resistance using susceptible and resistant strains of the same populations. Life history tables were compiled by collecting weekly data on mortality and fecundity of bugs from each strain and treatment throughout their lives. Selection led to a male-biased sex ratio, shortened oviposition period and decreased life-time reproductive rate. Generation time was shortened by selection, a change that represents a benefit rather than a cost. Using these life history characteristics we calculated that there would be a 90% return to pre-selection levels of susceptibility within 2- 6.5 generations depending on strain. The significant fitness costs associated with resistance suggest that insecticide rotation or utilization of non-insecticidal control tactics could be part of an effective resistance management strategy.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep10807