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Susceptibility of northern corn rootworm (Diabrotica barberi) populations to Cry3Bb1 and Gpp34/Tpp35Ab1 proteins in seedling and diet overlay toxicity assays.
Pereira, Adriano E; Huynh, Man P; Paddock, Kyle J; Geisert, Ryan W; Calles Torrez, Veronica; Knodel, Janet J; Moellenbeck, Daniel J; Reinders, Jordan D; Meinke, Lance J; Schneider, Sharon K; Coudron, Thomas A; Shelby, Kent S; Hibbard, Bruce E.
Afiliação
  • Pereira AE; Plant Genetics Research Unit, USDA-ARS, Columbia, MO 65211, USA.
  • Huynh MP; RNAiSSANCE AG, 1005 North Warson Road, Suite 375, St. Louis, MO 63132, USA.
  • Paddock KJ; Division of Plant Science & Technology, University of Missouri, Columbia, MO 65211, USA.
  • Geisert RW; Department of Plant Pathology, North Dakota State University, Fargo, ND 58108, USA.
  • Calles Torrez V; Division of Plant Science & Technology, University of Missouri, Columbia, MO 65211, USA.
  • Knodel JJ; Department of Plant Pathology, North Dakota State University, Fargo, ND 58108, USA.
  • Moellenbeck DJ; Department of Plant Pathology, North Dakota State University, Fargo, ND 58108, USA.
  • Reinders JD; DM Crop Research Group, Inc., 12155 J Ave, Perry, IA 50220, USA.
  • Meinke LJ; Department of Entomology, University of Nebraska, Lincoln, NE 68583, USA.
  • Schneider SK; Department of Entomology, University of Nebraska, Lincoln, NE 68583, USA.
  • Coudron TA; North Central Agricultural Research Laboratory, USDA-ARS, Brookings, SD 57006, USA.
  • Shelby KS; Biological Control of Insect Research Laboratory, USDA-ARS, Columbia, MO 65203, USA.
  • Hibbard BE; Biological Control of Insect Research Laboratory, USDA-ARS, Columbia, MO 65203, USA.
J Econ Entomol ; 117(1): 178-186, 2024 Feb 12.
Article em En | MEDLINE | ID: mdl-38011807
The northern corn rootworm, Diabrotica barberi Smith & Lawrence (Coleoptera: Chrysomelidae) is a major pest of maize in the United States Corn Belt. Recently, resistance to Bacillus thuringiensis (Bt) maize was reported in North Dakota and increased use of Bt maize hybrids could facilitate resistance evolution in other maize-producing states. In this study, susceptibility to Bt proteins was evaluated in wild D. barberi populations from 8 fields collected in 5 different states (Minnesota, Missouri, Nebraska, Iowa, and North Dakota). Field populations were compared to a susceptible D. barberi colony in seedling and diet toxicity assays conducted with 3 concentrations of Cry3Bb1 (0.4, 4.0, and 40.0 µg/cm2) and Gpp34/Tpp35Ab1 (previously called Cry34/35Ab1; 1.4, 14.0, and 140.0 µg/cm2). The 2019 population from Meeker Co., Minnesota (MN-2019), exhibited the lowest mortality to Cry3Bb1 and also had nominally lowest mortality to Gpp34/Tpp35Ab1 at the highest concentrations tested in diet toxicity assays. Percent second instar was also highest for larvae of the Minnesota population surviving Cry3Bb1. In seedling assays, MN and IA-2018 populations exhibited the highest proportion survival and dry weight to both proteins expressed in corn. No significant differences in mortality, percent second instar, and dry weight were observed at the highest concentration for both proteins among the populations collected in in 2020. Most D. barberi populations were still highly susceptible to Cry3Bb1 and Gpp34/Tpp35Ab1 proteins based on diet and seedling assays, but resistance appears to be developing in some D. barberi populations. Now that methods are available, resistance monitoring may also be needed for D. barberi in some regions.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Bacillus thuringiensis / Besouros Limite: Animals Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Bacillus thuringiensis / Besouros Limite: Animals Idioma: En Ano de publicação: 2024 Tipo de documento: Article