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24 April 2017 Fitness Trade-Off Associated With Spinosad Resistance in Frankliniella occidentalis (Thysanoptera: Thripidae)
Xiaoyu Li, Yanran Wan, Guangdi Yuan, Sabir Hussain, Baoyun Xu, Wen Xie, Shaoli Wang, Youjun Zhang, Qingjun Wu
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Abstract

Frankliniella occidentalis (Pergande) is an economically important pest of agricultural crops. High resistance has been detected in field populations of F. occidentalis against the insecticide spinosad. In this study, we compared life history traits, body sizes, and feeding behaviors (recorded via an electrical penetration graph) of spinosad-susceptible (Ivf03) and spinosad-resistant (NIL-R) near-isogenic lines of F. occidentalis. Life table analysis showed that NIL-R had reduced female longevity and reduced fecundity. The relative fitness of NIL-R (0.43) was less than half that of Ivf03. NIL-R individuals were smaller than Ivf03 individuals, both in body length and body width at every stage. The number and duration of feeding activities were significantly reduced in NIL-R, with the exception of total duration of long-ingestion probes. These results suggest that there is a fitness tradeoff associated with spinosad resistance in F. occidentalis, and that the development of resistance in this pest species may be reduced by rotating spinosad with other pesticides lacking cross-resistance.

© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com
Xiaoyu Li, Yanran Wan, Guangdi Yuan, Sabir Hussain, Baoyun Xu, Wen Xie, Shaoli Wang, Youjun Zhang, and Qingjun Wu "Fitness Trade-Off Associated With Spinosad Resistance in Frankliniella occidentalis (Thysanoptera: Thripidae)," Journal of Economic Entomology 110(4), 1755-1763, (24 April 2017). https://doi.org/10.1093/jee/tox122
Received: 16 January 2017; Published: 24 April 2017
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