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Article
Late-Instar European Corn Borer (Lepidoptera: Crambidae) Tunneling and Survival in Transgenic Corn Hybrids
Journal of Economic Entomology
  • K. A. Walker, Iowa State University
  • Richard L. Hellmich, Iowa State University
  • L. C. Lewis, Iowa State University
Document Type
Article
Publication Date
8-1-2000
DOI
10.1603/0022-0493-93.4.1276
Abstract

Field studies were conducted in 1996 and 1997 to determine injury by and survival of late-instar European corn borer, Ostrinia nubilalis (Hu¨ bner), on genetically altered Bacillus thuringiensis Berliner corn, Zea mays L. Cry1Ab events 176, Bt11, MON810, and MON802; Cry1Ac event DBT418; and Cry9C event CBH351 were evaluated. Plants of each corn hybrid were manually infested with two third-, fourth-, or Þfth-instar O. nubilalis. Larvae were held in proximity to the internode of the plant above the ear with a mesh sleeve. Larvae were put on the plants during corn developmental stages V8, V16, R1, R3, R4, R5, and R6. This study shows that not all B. thuringiensis hybrids provide the same protection against O. nubilalis injury. Hybrids with B. thuringiensis events Bt11, MON810, MON802, and CHB351 effectively protected the corn against tunneling by late-instar O. nubilalis. Event 176 was effective in controlling late-instar O. nubilalis during V12 and V16 corn developmental stages; however, signiÞcant tunneling occurred by fourth instars during R3 and R5. Event DBT418 was not effective in controlling late-instar O. nubilalis during corn vegetative or reproductive stages of development. Whether the B. thuringiensis hybrids satisÞed high- and ultrahigh- dose requirements is discussed.

Comments

This article is from Journal of Economic Entomology; 93 (2000); 1276-1285; doi:10.1603/0022-0493-93.4.1276

Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Copyright Owner
Entomological Society of America
Language
en
Date Available
2014-08-20
File Format
application/pdf
Citation Information
K. A. Walker, Richard L. Hellmich and L. C. Lewis. "Late-Instar European Corn Borer (Lepidoptera: Crambidae) Tunneling and Survival in Transgenic Corn Hybrids" Journal of Economic Entomology Vol. 93 Iss. 4 (2000) p. 1276 - 1285
Available at: http://works.bepress.com/richard_hellmich/23/