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Effects of transgenic cotton carrying Cry1A+CpTI and Cry1Ac genes on diversity of arthropod communities in cotton fields in North China

Published online by Cambridge University Press:  12 February 2007

Li Wei-Di ,
Wu Kong-Ming ,
Chen Xue-Xin ,
Feng Hong-Qiang ,
Xu Guang  and
Guo Yu-Yuan
Li Wei-Di
Affiliation:
Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100094, China Institute of Applied Entomology, Zhejiang University, Hangzhou, 310029, China
Wu Kong-Ming
Affiliation:
Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100094, China
Chen Xue-Xin*
Affiliation:
Institute of Applied Entomology, Zhejiang University, Hangzhou, 310029, China
Feng Hong-Qiang
Affiliation:
Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100094, China
Xu Guang
Affiliation:
Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100094, China
Guo Yu-Yuan
Affiliation:
Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100094, China
*
*Corresponding author. E-mail: xxchen@zju.edu.cn
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Abstract

The effects of insect-resistant transgenic cotton on the diversity of arthropod communities in cotton fields in North China were investigated during 2000–2001. The field experiments were conducted in non-insecticide treated plots of transgenic cotton lines (SGK321, a transgenic cotton variety carrying Cry1A+CpTI genes; GK12, a transgenic cotton variety carrying the Cry1Ac gene) and their conventional parent varieties (Shiyuan 321 and Shimian 3, respectively), and in sprayed plots of the parent varieties where pyrethroid insecticides were used regularly against the cotton bollworm. All the arthropods were sucked up using a portable suction device and identified to species wherever possible. They were later sorted into guilds (pests, natural enemies and neutral arthropods) for diversity analysis using the method of Shannon's index. The diversity of arthropod communities in transgenic cotton plots was similar to that in conventional cotton fields without spraying, but Shannon's index for total arthropod community and the neutral arthropod guild in Bt cotton fields were significantly higher than those in sprayed plots in the mid and late growing stages of cotton. It is concluded that planting of Bt cotton could increase the stability of arthropod communities in cotton ecological systems and benefit the management of insect pests in cotton.

Keywords

insect-resistant transgenic cottonarthropod communitydiversity
Type
Research Article
Information
Chinese Journal of Agricultural Biotechnology , Volume 1 , Issue 1 , April 2004 , pp. 17 - 21
Copyright
Copyright © China Agricultural University and Cambridge University Press 2004

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