ABSTRACT One major concern regarding the release of Bt rice is its potential impact through tritrophic interactions on nontarget arthropods, especially natural enemies. We studied the effects of two Bt transgenic rice varieties, TT9-3 and KMDl, expressing CrylAb/CrylAc and CrylAb, respectively, on a predatory ground spider [Ummeliata insecticeps (Bösenberg et Strand)] supplied with Bt rice-fed brown planthopper [Nilaparvata lugens (Stål)] nymphs. Although immunoassays confirmed that U. insecticeps ingested Bt insecticidal protein when supplied with Bt rice-fed N. lugens, no negative effects were found on its survival and development. Furthermore, the fecundity of U. insecticeps fed prey reared on Bt rice was not significantly different from that of those fed prey reared on non-Bt rice. A 3-yr field trial indicated that Bt rice did not significantly affect the population density of U. insecticeps in comparison with non-Bt rice. In conclusion, the Bt rice lines tested in this study had no adverse effects on the survival, developmental time, or fecundity of U insecticeps in the laboratory or on population dynamics in the field.
Laboratory and Field Assessments of Prey-Mediated Effects of Transgenic Bt Rice on Ummeliata insecticeps (Araneida: Linyphiidae)
J. Tian,Zhi-cheng Liu,Mao Chen,Yang Chen,Xue-Xin Chen,Yu-fa Peng,Cui Hu,Gong-yin Ye
Published 2010 in Environmental Entomology
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- Publication year
2010
- Venue
Environmental Entomology
- Publication date
2010-08-04
- Fields of study
Agricultural and Food Sciences, Medicine, Biology, Environmental Science
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- Source metadata
Semantic Scholar, PubMed
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