Solmaz Azimi Shima Rahmani Masoud Tohidfar Ahmad Ashouri Department of Plant Protection, Azarbaijan Shahid Madani University, Tabriz, Iran Department of Entomology, Science and Research Branch, Islamic Azad University, Tehran, Iran Department of Agriculture, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran Department of Plant Protection, Faculty of Sciences and Agricultural Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran Arthropods ISSN 2224-4255 http://www.iaees.org/publications/journals/arthropods/online-version.asp 2016 5 3 87 96 International Academy of Ecology and Environmental Sciences Hong Kong 13 March 2016 20 April 2016 1 September 2016 Bt cotton demography Bemisia tabaci transgenenic plant Transgenic cotton expressing the Cry 1Ab protein of Bacillus thuringiensis developing against Helocoverpa armigera may be affect on secondary pest such as Bemisia tabaci. In this study effects of Bt cotton on demographic parameters of B. tabaci were assessed and the data analyzed using the age specific, two-sex life table parameters. Results showed that getting to the adulthood stage, was faster on non-Bt cotton in comparison with Bt cotton. Also the fecundity was higher on non-Bt cotton than that on Bt cotton. Some of the population parameters (r, R0 and T) of B. tabaci were affected by the Bt cotton significantly. The intrinsic rate of increase (r) on Bt and non-Bt cotton was 0.07 day-1 and 0.1 day-1, respectively. The net reproductive rate (R0) was 20.68 and 15.04 offspring/individual on Bt and non-Bt cotton, respectively. Mean generation time (T) in non-Bt cotton was 27.22 and 34.62 days in Bt cotton. The results indicated that the life history of B. tabaci in the laboratory condition was influenced by host plant quality and Bt cotton was not a suitable host for B. tabaci. The western immunoblot method showed that the Cry protein detection in honeydew was positive which indicated that the Cry protein was ingested. Results revealed that the transgenic cotton could adversely affect the secondary pest and the natural enemies which feed on such pests as a host or their honeydew as a food source should be considered. DOI 10.0000/issn-2224-4255-arthropods-2016-v5-0009 http://www.iaees.org/publications/journals/arthropods/articles/2016-5(3)/effect-of-Iranian-Bt-cotton-on-life-table-of-Bemisia-tabaci.pdf