Evaluation of Attribute II Bt Sweet Corn Resistance and Reduced-Risk Insecticide Applications for Control of Corn Earworm

Authors: R. Weinzierl, R. Estes, N. Tinsley, M. Keshlaf

Abstract:

The corn earworm, Helicoverpa zea Boddie, is a serious pest of corn. Larval feeding in ear tips destroys kernels and allows growth of fungi and production of mycotoxins. Infested sweet corn is not marketable. Development of improved transgenic hybrids expressing insecticidal toxins from Bacillus thuringiensis (Bt) may limit or prevent crop losses. The effectiveness of Attribute^® II Bt resistance and applications of Voliam Xpress insecticide were evaluated for effectiveness in controlling corn earworm in plots near Urbana, IL, USA, in 2013. Where no insecticides were applied, ear infestations and kernel damage in Attribute^® II ‘Protector’ plots were consistently lower (near zero) than in plots of the non-Bt isoline ‘Garrison.’ Multiple applications of Voliam Xpress significantly reduced the number of corn earworm larvae and kernel damage in the Garrison plots, but infestations and damage in these plots were greater than in Protectorplots that did not receive insecticide applications. Our results indicate that Attribute^® II Bt resistance is more effective than multiple applications of an insecticide for preventing losses caused by corn earworm in sweet corn.

Keywords: Bacillus thuringiensis, Helicoverpa zea, insect pest management, transgenic sweet corn.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1326812

References:

[1] B. Flood, R. Foster, B. Hutchison "Sweet Corn. In "Vegetable Insect Management with emphasis on the Midwest", Willoughby, OH, Meister Publishing Company, pp. 19-40, 1995.
[2] G. R. Fitt, G. "The ecology of Heliothis species in relation to agroecosystems”, Annu. Rev. Entomol Vol. 34, pp. 17–52, 1989.
[3] R. W. Straub "Insect Control on late-season sweet corn with foliar sprays of conventional and reduced-risk insecticides”, Arth. Mngmt. Tests, Vol. 24, pp. 133, 1998.
[4] C. D. Reid "Ability of Oriusinsidiosus (Hemiptera: Anthocoridae) to Search for, Find, and Attack European Corn Borer and Corn Ear worm Eggs on Corn”, Journal of Economic Entomology, vol. 84, pp. 83-86, February 1991.
[5] A.M. Shelton, D.L. Olmstead, E.C. Burkness, W.D. Hutchison, G. Dively, C. Welty and A.N. Sparks. "Multi-state trials of Bt sweet corn varieties for control of the corn earworm, Helicoverpa zea (Lepidoptera: Noctuidae)”,J. Econ. Entomol.,Vol. 106, pp. 2151-2159.2013.
[6] G.D. Buntin, R. Lee, D. Wilson, R. McPherson "Evaluation of Yieldgard transgenic resistance for control of fall armyworm and corn earworm (Lepidoptera: noctuidae) on corn”, Florida Entomologist, Vol. 84, pp. 37-42, 2001.
[7] E.M. Cullen, M.E. Gray, A. J. Gassman, B.E. Hibbard "Resistance to Bt corn by western corn rootworm (Coleoptera: Chrysomelidae) in the U.S. Corn Belt.” J. Integ. Pest Magmt, Vol. 4, 2013; DOI: http://dx.doi.org/10.1603/IPM13012.
[8] G. C. Lozzia, C. Furlanis, B. Manachini, I. E. Rigamonti"Effects of Bt corn on RhopalosiphumpadiL. (RhynchotaAphididae) and on its predator Chrysoperlacarnea Stephen (Neuroptera Chrysopidae)”, Bollettino Zool. Agraria Bach., vol. 30, pp. 153-164, 1998.
[9] C. D. Pilcher, J. J. Obrycki, M. E. Rice, L. C. Lewis "Preimaginal development, survival, and field abundance of insect predators on transgenic Bacillus thuringiensis corn”, Environ. Entomol.,vol. 26, pp. 446-454, 1997.
[10] W. P. Williams, J. B. Sagers, J. A. Hanten, F. M. Davis, P. M. Buckley "Transgenic corn evaluated for resistance to fall armyworm and southwestern corn borer”, Crop Sci.,vol. 37, pp. 957-962, 1997.
[11] R. E. Lynch, B. R. Wiseman, D. Plaisted, D. Warnick"Evaluation of transgenic sweet corn hybrids expressing CryIA(b) toxin for resistance to corn earworm and fall armyworm (Lepidoptera: Noctuidae)”, J. Econ. Entomol., vol. 92, pp. 246-252, 1999.
[12] K. Ostlie, W. Hutchison, R. Hellmich "Bt corn and European corn borer”, NCR Publ. 602. Univ. of Minnesota, St. Paul, MN, 1997.
[13] C. Armstrong, G. Parker, J. Pershing, S. Brown, P. Sanders, D. Duncan, T. Stone, D. Dean, D. Deboer, J. Hart, A. Howe, F. Morrish, M. Pajeau, W. Peterson, B. Reich, R. Rodriguez, C. Santino, S. Sato, W. Schuler, S. Sims, S. Stehling, L. Tarochione, M. Fromm "Field evaluation of European corn borer control in progeny of 173 transgenic corn events expressing an insecticidal protein for Bacillus thuringiensis”, Crop Sci., Vol. 35, pp. 550-557, 1995.
[14] N. W. Windstrom "An evaluation of methods for measuring corn earworm injury”, J. Econ. Entomol., vol. 60, pp. 791-794, 1967.