Acta Entomologica Sinica (2004) 47, 538-542
Hong-Xu Zhou, Jian-Ying Guo and Fang-Hao Wan (2004)
[Effect of transgenic Cry1Ac + CpTI cotton (SGK321) on the population dynamics of pests and their natural enemies]
Acta Entomologica Sinica 47 (4), 538-542
Abstract: Effects of transgenic cotton (cv. SGK321, with the inserted genes of Cry1Ac and CpTI) on the population dynamics of pests and natural enemies were studied in Nanpi County, Hebei Province in 2002. It was shown that the composition of pest and predatory species was similar between the plots of transgenic cotton SGK321 and its parental line, sy321 cotton, but with different accumulated numbers for each species. From 24 surveys during May 23 - September 16., the accumulated number of the main pest species decreased in SGK321, compared to those of sy321, by 89.5% , 64.5% , 21.8%, 15.6% and 33.7% for Helicoverpa armigera, Aphis gossypii, Lygus lucorum, Bemisia tabaci and Empoasca flavescens, respectively. For the main natural enemies, the accumulated numbers of Propylea japonica and Chrysopa sinica increased by 34.0% and 9.1% , respectively during the same period; but those of Harmonia axyridis, Orius minutus, Campylomma diversicornis, Lysiphlebia japonica and spiders decreased by 28.6% , 6.5%, 43.1%, 44.7% and 14.0% , respectively. Population dynamics of the main pest and predatory species showed that the population peak of A. gossypii, E. flavescens and B. tabaci occurred from the middle to late July, late August, to mid-September, and late August to early and mid-September, respectively.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Fang Hao Wan
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
resistance/tolerance/defence of host
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
