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Impact of Cry3Bb1-expressing Bt maize on adults of the western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae).
Pest Manag Sci. 2011 Jul; 67(7):807-14.PM

Abstract

BACKGROUND

Genetically engineered maize producing insecticidal Cry3Bb1 protein from Bacillus thuringiensis (Bt) is protected from root damage by corn rootworm larvae. An examination was made to establish whether western corn rootworm (Diabrotica virgifera virgifera) adults are affected by Cry3Bb1-expressing maize (MON88017) when feeding on above-ground tissue.

RESULTS

In laboratory bioassays, adult D. v. virgifera were fed for 7 weeks with silk, leaves or pollen from Bt maize or the corresponding near-isoline. Male, but not female, survival was reduced in the Bt-leaf treatment compared with the control. Female weight was lower when fed Bt maize, and egg production was reduced in the Bt-silk treatment. ELISA measurements demonstrated that beetles feeding on silk were exposed to higher Cry3Bb1 concentrations than beetles collected from Bt-maize fields in the United States. In contrast to silk and pollen, feeding on leaves resulted in high mortality and low fecundity. Females feeding on pollen produced more eggs than on silk. C:N ratios indicated that silk does not provide enough nitrogen for optimal egg production.

CONCLUSIONS

Direct effects of Cry3Bb1 on adult beetles could explain the observed effects, but varietal differences between Bt and control maize are also possible. The impact of Bt maize on adult populations, however, is likely to be limited.

Authors+Show Affiliations

Agroscope Reckenholz-Tänikon Research Station ART, Reckenholzstrasse 191, Zurich, Switzerland. michael.meissle@art.admin.chNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21360646

Citation

Meissle, Michael, et al. "Impact of Cry3Bb1-expressing Bt Maize On Adults of the Western Corn Rootworm, Diabrotica Virgifera Virgifera (Coleoptera: Chrysomelidae)." Pest Management Science, vol. 67, no. 7, 2011, pp. 807-14.
Meissle M, Hellmich RL, Romeis J. Impact of Cry3Bb1-expressing Bt maize on adults of the western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae). Pest Manag Sci. 2011;67(7):807-14.
Meissle, M., Hellmich, R. L., & Romeis, J. (2011). Impact of Cry3Bb1-expressing Bt maize on adults of the western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae). Pest Management Science, 67(7), 807-14. https://doi.org/10.1002/ps.2117
Meissle M, Hellmich RL, Romeis J. Impact of Cry3Bb1-expressing Bt Maize On Adults of the Western Corn Rootworm, Diabrotica Virgifera Virgifera (Coleoptera: Chrysomelidae). Pest Manag Sci. 2011;67(7):807-14. PubMed PMID: 21360646.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Impact of Cry3Bb1-expressing Bt maize on adults of the western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae). AU - Meissle,Michael, AU - Hellmich,Richard L, AU - Romeis,Jörg, Y1 - 2011/02/24/ PY - 2010/08/31/received PY - 2010/12/03/revised PY - 2010/12/16/accepted PY - 2011/3/2/entrez PY - 2011/3/2/pubmed PY - 2011/9/29/medline SP - 807 EP - 14 JF - Pest management science JO - Pest Manag Sci VL - 67 IS - 7 N2 - BACKGROUND: Genetically engineered maize producing insecticidal Cry3Bb1 protein from Bacillus thuringiensis (Bt) is protected from root damage by corn rootworm larvae. An examination was made to establish whether western corn rootworm (Diabrotica virgifera virgifera) adults are affected by Cry3Bb1-expressing maize (MON88017) when feeding on above-ground tissue. RESULTS: In laboratory bioassays, adult D. v. virgifera were fed for 7 weeks with silk, leaves or pollen from Bt maize or the corresponding near-isoline. Male, but not female, survival was reduced in the Bt-leaf treatment compared with the control. Female weight was lower when fed Bt maize, and egg production was reduced in the Bt-silk treatment. ELISA measurements demonstrated that beetles feeding on silk were exposed to higher Cry3Bb1 concentrations than beetles collected from Bt-maize fields in the United States. In contrast to silk and pollen, feeding on leaves resulted in high mortality and low fecundity. Females feeding on pollen produced more eggs than on silk. C:N ratios indicated that silk does not provide enough nitrogen for optimal egg production. CONCLUSIONS: Direct effects of Cry3Bb1 on adult beetles could explain the observed effects, but varietal differences between Bt and control maize are also possible. The impact of Bt maize on adult populations, however, is likely to be limited. SN - 1526-4998 UR - https://www.unboundmedicine.com/medline/citation/21360646/Impact_of_Cry3Bb1_expressing_Bt_maize_on_adults_of_the_western_corn_rootworm_Diabrotica_virgifera_virgifera__Coleoptera:_Chrysomelidae__ L2 - https://doi.org/10.1002/ps.2117 DB - PRIME DP - Unbound Medicine ER -