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1 December 2010 Multi-Generation Effects of Bt Rice on Anagrus nilaparvatae, a Parasitoid of the Nontarget Pest Nilapavarta lugens
Ming-Qing Gao, Shou-Peng Hou, De-Qiang Pu, Min Shi, Gong-Yin Ye, Xue-Xin Chen
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Abstract

Little is known about the potential cumulative long-term effects of transgenic crops on nontarget organisms. In the present laboratory study, the potential cumulative effects of transgenic Bacillus thuringiensis (Bt) rice on parasitoids in successive generations were observed for an egg parasitoid, Anagrus nilaparvatae parasitizing eggs of Nilaparvata lugens (Stål) (Hemiptera: Delphacidae) feeding on Bt rice. Enzyme-linked immunosorbent assay test confirmed that Cry1Ab insecticidal protein could be detected in newly eclosed parasitoid adults. However, no significant effect on the fecundity of Anagrus nilaparvatae Pang et Wang (Hymenoptera: Mymaridae) was observed between Bt and non-Bt rice. Developmental times of both genders of A. nilaparvatae parasitizing host eggs laid in Bt (KMD1 and KMD2) rice lines were significantly prolonged from first generation to second generation, but not always prolonged from third generation to 11th generation as compared with the control rice line. Furthermore, the sex ratio of A. nilaparvatae progeny from the first generation to 11th generation in three rice lines was not significantly different. In general, our results suggested that the effect of Bt rice on this parasitoid could be negligible.

© 2010 Entomological Society of America
Ming-Qing Gao, Shou-Peng Hou, De-Qiang Pu, Min Shi, Gong-Yin Ye, and Xue-Xin Chen "Multi-Generation Effects of Bt Rice on Anagrus nilaparvatae, a Parasitoid of the Nontarget Pest Nilapavarta lugens," Environmental Entomology 39(6), 2039-2044, (1 December 2010). https://doi.org/10.1603/EN10035
Received: 5 February 2010; Accepted: 1 July 2010; Published: 1 December 2010
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KEYWORDS
Anagrus nilaparvatae
developmental time
fecundity
successive generation
transgenic Bt rice
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