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1 June 2012 Effects of Two Bt Rice Lines T2A-1 and T1C-19 on the Ecological Fitness and Detoxification Enzymes of Nilaparvata lugens(Hemiptera: Delphacidae) from Different Populations
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Abstract

The brown planthopper, Nilaparvata lugens Stål (Hemiptera: Delphacidae), exhibits geographic and temporal variations in its virulence and damage characteristics on cultivated rice varieties, so the potential ecological risk of the nontarget effectiveness of Bt rice on different brown planthopper populations should be addressed. The nontarget effects of two Bt rice lines T2A-1 (Cry2A rice) andT1C-19 (Cry1C rice) on six brown planthopper populations with geographical, virulent, and resistant variations were evaluated. Populations differed significantly in relation to brown planthopper nymphal survival, nymphal duration, and female adult weight. T2A-1 and T1C-19 did not affect the ecological fitness parameters of brown planthopper compared with the parental non-Bt rice MH63. Both esterase and glutathione-S-transferase activities differed between brown planthopper populations. Esterase activity of some brown planthopper populations was significantly affected by the rice lines. It is important to take account of these findings in management of nontarget brown planthopper in Cry2A or Cry1C rice in the future.

© 2013 Entomological Society of America
Yajun Yang, Jingjing He, Biqin Dong, Hongxing Xu, Qiang Fu, Xusong Zheng, Yongjun Lin, and Zhongxian Lu "Effects of Two Bt Rice Lines T2A-1 and T1C-19 on the Ecological Fitness and Detoxification Enzymes of Nilaparvata lugens(Hemiptera: Delphacidae) from Different Populations," Journal of Economic Entomology 106(4), 1887-1893, (1 June 2012). https://doi.org/10.1603/EC13041
Received: 22 January 2013; Accepted: 1 May 2013; Published: 1 June 2012
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