African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12481

Full Length Research Paper

Biological parameters of the non-target pest Aphis gossypii Glover (Hemiptera: Aphididae) on genetically modified (GM) Bt cotton

  Thiago Alexandre Mota*, Maria Freire de Souza, Marcos Gino Fernandes, Paulo Rogério Beltramin da Fonseca, Samir Oliveira Kassab and Jean Carlo de Quadros        
Programa de Pós-graduação em Entomologia e Conservação da Biodiversidade, Faculdade Ciências Biológicas e Ambientais, Universidade Federal da GrandeDourados (UFGD), 79804-970, Dourados, MS, Brasil.
Email: [email protected]

  •  Accepted: 25 March 2013
  •  Published: 17 April 2013



In the present work, we aimed to evaluate: 1) the influence of the Cry1Ac protein expressed by the genetically modified cotton variety (Bt) NuOpal, on the biological parameters of a non-target pest, Aphis gossypii, reared under laboratory conditions; 2) the influence of plant age on aphid development. Cotton cultivars were grown following technical advice. In the laboratory, the aphids were separated into plastic containers including a cotton sheet, which was changed daily with the help of a moist cotton cloth. Observations were carried out daily, and the duration of the immature and adult stages, and offspring number, were recorded. Our results show thatregardless of the differences in the duration of each instar, cultivars Bt and non-Bt and the different ages of the plant to Bt, no differences were seen in the total duration of these phases. It was only during the reproductive period that differences were observed among genotypes for 120 days. Regarding the number of offspring and longevity total, there were differences between the different ages of the Bt treatment.


Key words:  Biosafety, transgenic, Gossypium hirsutum, genetically modified (GM) plant.