Survival and development of a stored-product pest, Sitophilus zeamais (Coleoptera: Curculionidae), and its natural enemy, the parasitoid Lariophagus distinguendus (Hymenoptera: Pteromalidae), on transgenic Bt maize
Version of Record online: 9 OCT 2012
© 2012 Society of Chemical Industry
Pest Management Science
Volume 69, Issue 5, pages 602–606, May 2013
How to Cite
Hansen, L. S., Lövei, G. L. and Székács, A. (2013), Survival and development of a stored-product pest, Sitophilus zeamais (Coleoptera: Curculionidae), and its natural enemy, the parasitoid Lariophagus distinguendus (Hymenoptera: Pteromalidae), on transgenic Bt maize. Pest. Manag. Sci., 69: 602–606. doi: 10.1002/ps.3410
- Issue online: 11 APR 2013
- Version of Record online: 9 OCT 2012
- Accepted manuscript online: 21 AUG 2012 09:15AM EST
- Manuscript Accepted: 21 AUG 2012
- Manuscript Revised: 7 AUG 2012
- Manuscript Received: 7 JUN 2012
- Bt maize;
- stored-product pests;
- biological control;
- transgenic maize;
- tritrophic interactions
The effect of transgenic maize (Zea mays L.) containing a lepidopteran-specific Bt toxin on a stored-product pest, Sitophilus zeamais Motschulsky, and its parasitoid, Lariophagus distinguendus Förster, was examined in the laboratory to test the impact of transgenic maize on stored-product pests and their biological control.
Weevils were not harmfully affected by transgenic Bt maize in their development characteristics (development time, body mass), and females emerging from transgenic maize kernels were larger. However, significantly fewer parasitoid females emerged from weevils that developed in transgenic kernels, although parasitoids did not develop more slowly and were not different in size or mass from their conspecifics emerging from hosts in non-transgenic maize kernels.
The emergence of female parasitoids was reduced in transgenic Bt maize, and this effect cannot be explained by the known lepidopteran-specific toxicity of Bt Cry1Ab toxin.