Impact of the Bt Corn Proteins Cry34/35Ab1 and Cry3Bb1, Alone or Pyramided, on Western Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence in the Field.
J Econ Entomol. 2015 Aug; 108(4):1986-93.JE

Abstract

Western corn rootworm, Diabrotica virgifera virgifera LeConte, is a major pest of corn, Zea mays L. The effect of the Bt proteins Cry34/35Ab1 and Cry3Bb1, alone or pyramided in corn hybrids on D. v. virgifera adult emergence was evaluated in field experiments for 3 yr. Experiments were infested artificially with 2,500 viable D. v. virgifera eggs per row meter of corn. The reduction in beetle emergence compared with non-Bt controls, from Cry34/35Ab1, Cry3Bb1, and the pyramided hybrids ranged from 64.3 to 97.4%, 91.1 to 95.2%, and 98.1 to 99.6%, respectively. The sex ratio of emerged beetles was usually female-biased from the Cry3Bb1 and pyramided treatments, but not from Cry34/35Ab1 treatment alone. Emergence from all Bt hybrids was delayed compared with the control, with the delay longest from the pyramided hybrid. In 2013, three egg infestation levels were tested, with density-dependent mortality observed at 1,250 viable eggs per row meter. The effect of Bt proteins on the emergence timing and sex ratio of D. v. virgifera may impact the suitability of resistance management plans, specifically the effectiveness of the refuge strategy. Susceptible males emerging from refuge might not be synchronized to mate with potentially resistant females emerging later from Bt corn hybrids.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Hitchon AJ

Department of Plant Agriculture, Ridgetown Campus, University of Guelph, 120 Main St. E., Ridgetown, ON N0P 2C0, Canada.

Smith JL

Department of Plant Agriculture, Ridgetown Campus, University of Guelph, 120 Main St. E., Ridgetown, ON N0P 2C0, Canada.

French BW

North Central Agricultural Research Laboratory, 2923 Medary Ave., Brookings, SD, 57006.

Schaafsma AW

Department of Plant Agriculture, Ridgetown Campus, University of Guelph, 120 Main St. E., Ridgetown, ON N0P 2C0, Canada. aschaafs@uoguelph.ca.

MeSH

AnimalsBacillus thuringiensisColeopteraEndotoxinsFemaleMaleOntarioPest Control, BiologicalPlants, Genetically ModifiedSex RatioZea mays

Pub Type(s)

Journal Article

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

Language

eng

PubMed ID

26470344

Citation

Hitchon, A J., et al. "Impact of the Bt Corn Proteins Cry34/35Ab1 and Cry3Bb1, Alone or Pyramided, On Western Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence in the Field." Journal of Economic Entomology, vol. 108, no. 4, 2015, pp. 1986-93.

Hitchon AJ, Smith JL, French BW, et al. Impact of the Bt Corn Proteins Cry34/35Ab1 and Cry3Bb1, Alone or Pyramided, on Western Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence in the Field. J Econ Entomol. 2015;108(4):1986-93.

Hitchon, A. J., Smith, J. L., French, B. W., & Schaafsma, A. W. (2015). Impact of the Bt Corn Proteins Cry34/35Ab1 and Cry3Bb1, Alone or Pyramided, on Western Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence in the Field. Journal of Economic Entomology, 108(4), 1986-93. https://doi.org/10.1093/jee/tov125

Hitchon AJ, et al. Impact of the Bt Corn Proteins Cry34/35Ab1 and Cry3Bb1, Alone or Pyramided, On Western Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence in the Field. J Econ Entomol. 2015;108(4):1986-93. PubMed PMID: 26470344.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Impact of the Bt Corn Proteins Cry34/35Ab1 and Cry3Bb1, Alone or Pyramided, on Western Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence in the Field. AU - Hitchon,A J, AU - Smith,J L, AU - French,B W, AU - Schaafsma,A W, Y1 - 2015/05/21/ PY - 2014/11/26/received PY - 2015/04/25/accepted PY - 2015/10/16/entrez PY - 2015/10/16/pubmed PY - 2016/6/15/medline KW - Diabrotica KW - maize KW - mating KW - refuge KW - resistance management SP - 1986 EP - 93 JF - Journal of economic entomology JO - J Econ Entomol VL - 108 IS - 4 N2 - Western corn rootworm, Diabrotica virgifera virgifera LeConte, is a major pest of corn, Zea mays L. The effect of the Bt proteins Cry34/35Ab1 and Cry3Bb1, alone or pyramided in corn hybrids on D. v. virgifera adult emergence was evaluated in field experiments for 3 yr. Experiments were infested artificially with 2,500 viable D. v. virgifera eggs per row meter of corn. The reduction in beetle emergence compared with non-Bt controls, from Cry34/35Ab1, Cry3Bb1, and the pyramided hybrids ranged from 64.3 to 97.4%, 91.1 to 95.2%, and 98.1 to 99.6%, respectively. The sex ratio of emerged beetles was usually female-biased from the Cry3Bb1 and pyramided treatments, but not from Cry34/35Ab1 treatment alone. Emergence from all Bt hybrids was delayed compared with the control, with the delay longest from the pyramided hybrid. In 2013, three egg infestation levels were tested, with density-dependent mortality observed at 1,250 viable eggs per row meter. The effect of Bt proteins on the emergence timing and sex ratio of D. v. virgifera may impact the suitability of resistance management plans, specifically the effectiveness of the refuge strategy. Susceptible males emerging from refuge might not be synchronized to mate with potentially resistant females emerging later from Bt corn hybrids. SN - 0022-0493 UR - https://www.unboundmedicine.com/medline/citation/26470344/Impact_of_the_Bt_Corn_Proteins_Cry34/35Ab1_and_Cry3Bb1_Alone_or_Pyramided_on_Western_Corn_Rootworm__Coleoptera:_Chrysomelidae__Beetle_Emergence_in_the_Field_ DB - PRIME DP - Unbound Medicine ER -

Tags

Impact of the Bt Corn Proteins Cry34/35Ab1 and Cry3Bb1, Alone or Pyramided, on Western Corn Rootworm (Coleoptera: Chrysomelidae) Beetle Emergence in the Field.J Econ Entomol. 2015 Aug; 108(4):1986-93.JE