Arthropod community structures in transgenic Bt cotton fields

Abstract

Abstract: Arthropod community structures were investigated in transgenic Bt cultivars, Bollgard ^®(B)and Chinese cotton 30(CC30), and common cultivars, control(C)and no control(NC)cotton field in North China in 1998.The results showed that compared with common cultivars,the species richness and the number of total individual of arthropod community in transgenic Bt cultivars field were reduced 2.4～16.3% and 71.0～78.3% respectively, in which dominant species in phytophagous subcommunity varied. The number of individual of predatory and parastic subcommunity were all increased. The similarity coeficient between CC30 and NC was 0.8243, B and NC 0.7320, B and C 0.3380,C and NC 0.3128, CC30 and C 0.2665. The order of diversity and evenness value of these were CC30(2.3712 and 0 6428), NC(2.3654 and 0.6251), B(2.1364 and 0.5791),and C(1.0877 and 0.2949), their dominant value was 0.8726(C), 0.3528(B),0.1178(NC)and 0.1048(CC30)respectively. It was concluded that different integrated pest management(IPM)strategy should be implemented in transgenic Bt cotton instead of common variety cotton field.

Key words: Transgenic Bt cotton, Arthropod, Community

CLC Number:

S435.622

WEI Guoshu, CUI Long, ZHANG Xiaomei, LIU Shun, L? Nan, ZHANG Qingwen. Arthropod community structures in transgenic Bt cotton fields[J]. Chinese Journal of Applied Ecology, 2001, (4): 576-580.

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