title: Influence of Dual-Bt Protein Corn on Bollworm, Helicoverpa zea (Boddie), Survivorship on Bollgard II Cotton.
abstract: Similar Cry proteins are expressed in both Bt corn, Zea mays L., and cotton, Gossypium hirsutum (L.), commercial production systems. At least one generation of corn earworm, Helicoverpa zea (Boddie), completes development on field corn in the Mid-South before dispersing across the landscape into other crop hosts like cotton. A concern is that Bt corn hybrids may result in selection for H. zea populations with a higher probability of causing damage to Bt cotton. The objective of this study was to determine the susceptibility of H. zea offspring from moths that developed on non-Bt and VT Triple Pro (VT3 PRO) field corn to lyophilized Bollgard II cotton tissue expressing Cry1Ac and Cry2Ab. Offspring of individuals reared on VT3 PRO expressing Cry1A.105 and Cry2Ab had a significantly higher LC50 two out of the three years this study was conducted. Excess larvae were placed on artificial diet and allowed to pupate to determine if there were any inheritable fitness costs associated with parental development on VT3 PRO corn. Offspring resulting from males collected from VT3 PRO had significantly lower pupal weight and longer pupal duration compared with offspring of individuals collected from non-Bt corn. However, offspring from females collected from VT3 PRO were not different from non-Bt offspring. Paternal influence on offspring in insects is not commonly observed, but illustrates the side effects of development on a transgenic plant expressing less than a high dose, 25 times the concentration needed to kill susceptible larvae.
authors.forename: M B
authors.initials: MB
authors.lastname: Von Kanel
authors.forename: J
authors.initials: J
authors.lastname: Gore
authors.forename: A
authors.initials: A
authors.lastname: Catchot
authors.forename: D
authors.initials: D
authors.lastname: Cook
authors.forename: F
authors.initials: F
authors.lastname: Musser
authors.forename: M
authors.initials: M
authors.lastname: Caprio
mesh_terms: D000818:Animals; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D004731:Endotoxins; D003368:Gossypium / Q000235:genetics*; D006460:Hemolysin Proteins; D009036:Moths / Q000502:physiology*; D030821:Plants, Genetically Modified; D003313:Zea mays / Q000235:genetics*
chemical_list: D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D004731:Endotoxins; D006460:Hemolysin Proteins; C030956:insecticidal crystal protein, Bacillus Thuringiensis
references.citation: J Econ Entomol. 2005 Aug;98(4):1311-9
references.pmid: 16156585
references.citation: Annu Rev Entomol. 2009;54:147-63
references.pmid: 19067630
references.citation: J Econ Entomol. 2003 Feb;96(1):137-42
references.pmid: 12650356
references.citation: Proc Biol Sci. 2001 Jul 22;268(1475):1475-80
references.pmid: 11454291
references.citation: J Econ Entomol. 2013 Aug;106(4):1525-34
references.pmid: 24020262
references.citation: Environ Entomol. 2015 Aug;44(4):1275-85
references.pmid: 26314074
references.citation: GM Crops. 2010 Jul-Sep;1(4):220-9
references.pmid: 21844677
references.citation: J Econ Entomol. 2001 Oct;94(5):1237-42
references.pmid: 11681689
references.citation: J Econ Entomol. 2001 Feb;94(1):76-85
references.pmid: 11233137
references.citation: Eur J Biochem. 1989 Dec 8;186(1-2):239-47
references.pmid: 2557209
references.citation: J Econ Entomol. 2003 Jun;96(3):755-62
references.pmid: 12852613
references.citation: Nat Biotechnol. 2005 Jan;23(1):57-62
references.pmid: 15637622
references.citation: Nat Biotechnol. 2008 Feb;26(2):199-202
references.pmid: 18259177
references.citation: J Econ Entomol. 2009 Oct;102(5):1935-47
references.pmid: 19886460
references.citation: J Econ Entomol. 2001 Oct;94(5):1268-79
references.pmid: 11681693
references.citation: J Econ Entomol. 2003 Jun;96(3):914-24
references.pmid: 12852636
references.citation: J Econ Entomol. 2006 Feb;99(1):164-75
references.pmid: 16573337
references.citation: J Econ Entomol. 2000 Aug;93(4):1265-8
references.pmid: 10985041
references.citation: J Invertebr Pathol. 2009 Sep;102(1):44-9
references.pmid: 19527726