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Extended investigation of field-evolved resistance of the corn earworm Helicoverpa zea(Lepidoptera: Noctuidae) to Bacillus thuringiensis Cry1A.105 and Cry2Ab2 proteins in thesoutheastern United States.
Yu, Wenbo; Lin, Shucong; Dimase, Marcelo; Niu, Ying; Brown, Sebe; Head, Graham P; Price, Paula A; Reay-Jones, Francis P F; Cook, Don; Reisig, Dominic; Thrash, Ben; Ni, Xinzhi; Paula-Moraes, Silvana V; Huang, Fangneng.
Afiliación
  • Yu W; Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
  • Lin S; Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
  • Dimase M; Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
  • Niu Y; Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
  • Brown S; Dean Lee Research Station, Louisiana State University Agricultural Center, Alexandria, LA 71302, USA.
  • Head GP; Bayer Crop Science, St. Louis, MO 63167, USA.
  • Price PA; Bayer Crop Science, St. Louis, MO 63167, USA.
  • Reay-Jones FPF; Department of Plant and Environmental Sciences, Clemson University, Florence, SC 29532, USA.
  • Cook D; Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776, USA.
  • Reisig D; Vernon G. James Research and Extension Center, North Carolina State University, Plymouth, NC 27962, USA.
  • Thrash B; Lonoke Extension Center, University of Arkansas, Lonoke, AR 72086, USA.
  • Ni X; Crop Genetics and Breeding Research, USDA-ARS, Tifton, GA 31793, USA.
  • Paula-Moraes SV; Entomology & Nematology Department, West Florida Research and Education Center, University of Florida, Jay, FL 32565, USA.
  • Huang F; Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA. Electronic address: fhuang@agcenter.lsu.edu.
J Invertebr Pathol ; 183: 107560, 2021 07.
Article en En | MEDLINE | ID: mdl-33631194
Previous studies have reported that the corn earworm/bollworm, Helicoverpa zea (Boddie), has developed field resistance to pyramided Bacillus thuringiensis (Bt) Cry1A/Cry2A maize and cotton in certain areas of the southeastern United States. The objective of the current study was to determine the current status and distribution of the resistance to Cry1A.105 and Cry2Ab2 in H. zea. In the study, 31 H. zea populations were collected from major maize planting areas across seven southeastern states of the United States during 2018 and 2019 and assayed against the two Bt proteins. Diet over-lay bioassays showed that most of the populations collected during the two years were significantly resistant to the Cry1A.105 protein. Most of the populations collected during 2019 were also resistant to Cry2Ab2, while significant variances were observed in the susceptibility of the populations collected during 2018 to Cry2Ab2. The results showed that Cry1A.105 and Cry2Ab2 resistance in H. zea is widely distributed in the regions sampled. The resistance to Cry1A.105 appeared to have plateaued, while selection for Cry2Ab2 resistance is likely still occurring. Thus, effective measures for mitigating the Cry1A/Cry2A resistance need to be developed and implemented to ensure the sustainable use of Bt crop biotechnology.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Bacillus thuringiensis / Resistencia a los Insecticidas / Endotoxinas / Agentes de Control Biológico / Toxinas de Bacillus thuringiensis / Proteínas Hemolisinas / Insecticidas / Mariposas Nocturnas Límite: Animals País/Región como asunto: America do norte Idioma: En Revista: J Invertebr Pathol Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Bacillus thuringiensis / Resistencia a los Insecticidas / Endotoxinas / Agentes de Control Biológico / Toxinas de Bacillus thuringiensis / Proteínas Hemolisinas / Insecticidas / Mariposas Nocturnas Límite: Animals País/Región como asunto: America do norte Idioma: En Revista: J Invertebr Pathol Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos