Translator Disclaimer
1 August 2004 Growth, Development, and Survival of Nosema pyrausta-Infected European Corn Borers (Lepidoptera: Crambidae) Reared on Meridic Diet and Cry1Ab
Author Affiliations +
Abstract

Transgenic corn, Zea mays L., hybrids expressing crystal protein endotoxin genes from Bacillus thuringiensis Berliner are an increasingly popular tactic for managing the European corn borer, Ostrinia nubilalis (Hübner), in North America. O. nubilalis populations also are often vulnerable to the ubiquitous entomopathogenic microsporidium Nosema pyrausta (Paillot). We examined the effect of feeding meridic diet incorporated with purified Cry1Ab on growth, development, and survival of Nosema-infected and uninfected neonate O. nubilalis. Infected larvae developed more slowly than uninfected larvae. Increasing the concentration of Cry1Ab in diet reduced larval development, and this effect was amplified by microsporidiosis. Infected larvae weighed significantly less than uninfected larvae. The relationship among Nosema infection, Cry1Ab concentration, and larval weight was fitted to an exponential function. The LC50 of infected larvae was one-third that of uninfected larvae, indicating that infected larvae are more vulnerable to toxin. This work has implications for resistance management of O. nubilalis and demonstrates that it is important to determine whether N. pyrausta is present when testing susceptibility of larvae to transgenic corn hybrids.

B. J. Reardon, R. L. Hellmich, D. V. Sumerford, and L. C. Lewis "Growth, Development, and Survival of Nosema pyrausta-Infected European Corn Borers (Lepidoptera: Crambidae) Reared on Meridic Diet and Cry1Ab," Journal of Economic Entomology 97(4), 1198-1201, (1 August 2004). https://doi.org/10.1603/0022-0493-97.4.1198
Received: 12 February 2004; Accepted: 1 March 2004; Published: 1 August 2004
JOURNAL ARTICLE
4 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top