Acta Entomologica Sinica (2003) 46, 311-317

Wan-Xue Liu, Fang-Hao Wan, Jian-Ying Guo, Fan Zhang, Guang-Zhi Sun and Zhao-Jun Meng (2003)
[Control of Helicoverpa armigera and related ecological effects following mass-release of Trichogramma chilonis in transgenic Bt and routine cotton fields]
Acta Entomologica Sinica 46 (3), 311-317
Abstract: To understand the ecological effects of mass-releasing Trichogramma chilonis in cotton fields, the biological control effects of this parasite were examined in two transgenic Bt cotton fields: one in which T. chilonis had been released and one in which it had not; and three non-transgenic cotton fields: one in which T. chilonis had been released in conjunction with chemical pesticides (IPM field), one with chemical pesticides only ( chemically controlled field) , and a natural control field as the control (no T. chilonis release or pesticides) , in Nanpi County, Hebei Province, 1998 - 2000. The results show that natural parasitism in both types of cotton fields gradually increased from 13. 3 % - 14.3% in the second generation to 26.7% - 28-.2% in the third generation and 60.8% - 61.4% in the fourth generation.
(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): Wan-Xue Liu, Fang Hao Wan

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
control - general
Research topic(s) for beneficials or antagonists:
application technology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Helicoverpa armigera	Cotton (Gossypium)	China (NE)
Trichogramma chilonis (parasitoid)	Helicoverpa armigera	Cotton (Gossypium)	China (NE)
Bacillus thuringiensis genes in crops (entomopathogen)	Helicoverpa armigera	Cotton (Gossypium)	China (NE)