Zoological Studies

Vol. 45 No. 1, 2006

Development and Reproduction of Propylaea japonica (Coleoptera: Coccinellidae) Raised on Aphis gossypii (Homoptera: Aphididae) Fed Transgenic Cotton

Sanrong Zhu1, Jianwei Su1, Xianghui Liu1, Li Du1, Erdal N. Yardim2, and Feng Ge1,*

1State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China
2Department of Entomology, Faculty of Agriculture, Yuzuncu Yil University, Van 65080, Turkey

Sanrong Zhu, Jianwei Su, Xianghui Liu, Li Du, Erdal N. Yardim, and Feng Ge (2006) A laboratory experiment was designed to evaluate the effects of transgenic cotton containing Bacillus thuringiensis (Berliner) Cry1Ac toxin on the survival, development, and fecundity of a predatory ladybeetle, Propylaea japonica (Thunberg), through a food chain using cotton aphid, Aphis gossypii Glover as an herbivorous prey. No significant differences were observed in total survival from hatching to adult, or in larval and pupal durations of P. japonica supplied with aphids fed on either transgenic or non-transgenic cotton. Similarly, no significant differences in longevity, reproduction, weight, or fatty acid contents of adult beetles were detected. Our results suggest that this type of transgenic cotton might have little effect on the survival, development, and fecundity of P. japonica through this food chain.

Key words: Development, Fecundity, Bt, Propylaea japonica (Thunberg), Aphis gossypi Glover.

*Correspondence: Tel and Fax: 86-10-62548093. E-mail: gef@panda.ioz.ac.cn