Effects of Bt maize on Frankliniella tenuicornis and exposure of thrips predators to prey-mediated Bt toxin. Obrist, L., B., Klein, H., Dutton, a., & Bigler, F. Entomologia Experimentalis et Applicata, 115(3):409-416, 2005.
Effects of Bt maize on Frankliniella tenuicornis and exposure of thrips predators to prey-mediated Bt toxin [pdf]Paper  abstract   bibtex   
As a part of a risk assessment procedure, the impact of Bt maize expressing Cry1Ab toxin on the thrips Frankliniella tenuicornis (Uzel) (Thysanoptera: Thripidae) was investigated, and the potential risks for predators feeding on thrips on Bt maize were evaluated. The effects of Bt maize on F. tenuicornis were assessed by measuring life-table parameters when reared on Bt and non-Bt maize. The content of Cry1Ab toxin in different stages of F. tenuicornis reared on Bt maize and the persistence of the toxin in adults where determined in order to evaluate the possible exposure of predators when feeding on thrips. In addition, Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) was used as a model predator to assess how the behaviour of prey and predator may influence the exposure of a natural enemy to the Bt toxin. Life-table parameter results showed that F. tenuicornis was not affected when it was reared on Bt maize. This indicates that the potential for prey quality-mediated effects on predators is low. Bt content was highest in thrips larvae and adults, and negligible in the non-feeding prepupal and pupal stages. The persistence of the Cry1Ab toxin in adult F. tenuicornis was short, resulting in a decrease of 97% within the first
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 title = {Effects of Bt maize on Frankliniella tenuicornis and exposure of thrips predators to prey-mediated Bt toxin},
 type = {article},
 year = {2005},
 identifiers = {[object Object]},
 keywords = {Cry1Ab,ELISA,Insect-resistant transgenic plants,Non-target effects,Prey-quality mediated effects,Risk assessment,Stage-specific predation,Thripidae,Thysanoptera},
 pages = {409-416},
 volume = {115},
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 abstract = {As a part of a risk assessment procedure, the impact of Bt maize   expressing Cry1Ab toxin on the thrips Frankliniella tenuicornis (Uzel)   (Thysanoptera: Thripidae) was investigated, and the potential risks for   predators feeding on thrips on Bt maize were evaluated. The effects of   Bt maize on F. tenuicornis were assessed by measuring life-table   parameters when reared on Bt and non-Bt maize. The content of Cry1Ab   toxin in different stages of F. tenuicornis reared on Bt maize and the   persistence of the toxin in adults where determined in order to evaluate   the possible exposure of predators when feeding on thrips. In addition,   Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) was used as a   model predator to assess how the behaviour of prey and predator may   influence the exposure of a natural enemy to the Bt toxin. Life-table   parameter results showed that F. tenuicornis was not affected when it   was reared on Bt maize. This indicates that the potential for prey   quality-mediated effects on predators is low. Bt content was highest in   thrips larvae and adults, and negligible in the non-feeding prepupal and   pupal stages. The persistence of the Cry1Ab toxin in adult F.   tenuicornis was short, resulting in a decrease of 97% within the first},
 bibtype = {article},
 author = {Obrist, L. B. and Klein, H. and Dutton, a. and Bigler, F.},
 journal = {Entomologia Experimentalis et Applicata},
 number = {3}
}
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