Performance of Cry1A.105-selected fall armyworm (Lepidoptera: Noctuidae) on transgenic maize plants containing single or pyramided Bt genes |
| |
| Affiliation: | 1. Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA, USA;2. Monsanto Company, St. Louis, MO, USA;1. Monsanto Company, 800 North Lindbergh Blvd., St. Louis, MO 63167, USA;2. Dow AgroSciences LLC, 9330 Zionsville Road, Indianapolis, IN 46268, USA;1. Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture (ESALQ), University of São Paulo (USP), Piracicaba, São Paulo, Brazil;2. EMBRAPA, Center for Temperate Climate Agricultural Research, Pelotas, Rio Grande do Sul, Brazil;3. Department of Crop Protection, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil;4. Pioneer Sementes, Itumbiara, Goiás, Brazil;5. Bayer Crop Science, Paulínia, São Paulo, Brazil;6. Instituto Phytus, Santa Maria, Rio Grande do Sul, Brazil;1. Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil;2. Instituto Nacional de Ciência e Tecnologia em Interações Planta-Praga, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil;3. DuPont Pioneer, 7100 NW 62nd Avenue, Johnston, IA, 50131, United States;1. Department of Entomology and Acarology, “Luiz de Queiroz” College of Agriculture (ESALQ), University of São Paulo (USP), Av. Pádua dias 11, Piracicaba, São Paulo 13418-900, Brazil;2. Department of Entomology, University of Minnesota, 219 Hodson Hall, 1980 Folwell Ave., 55108 Saint Paul, MN, USA;3. Dow AgroSciences LLC, 9330 Zionsville Rd, 46268 Indianapolis, IN, USA;1. Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA;2. Monsanto Company, St. Louis, MO 63167, USA |
| |
| Abstract: | Cry1A.105 is a Cry protein expressed in some transgenic Bacillus thuringiensis (Bt) maize products. In this study, performance of five populations of fall armyworm, Spodoptera frugiperda (J.E. Smith), were evaluated on four non-Bt and eight commercial and experimental Bt maize hybrids/lines (hereafter referred as maize products). The five insect populations included one Cry1A.105-susceptible strain, two Cry1A.105-resistant strains, and two F1 heterozygous genotypes. The eight Bt maize hybrids/lines consisted of five single-gene Bt maize products containing Cry1A.105, Cry2Ab2, Cry1F, or Cry1Ab protein, and three pyramided Bt maize products expressing Cry1A.105/Cry2Ab2, Cry1A.105/Cry2Ab2/Cry1F, or Cry1Ab/Vip3A for targeting aboveground lepidopteran maize pests. In the study, neonates of each population were tested on leaf tissues in the laboratory and whole plants in the greenhouse. Cry1A.105 and Cry1F maize killed 92.2–100% susceptible larvae in both test methods, while resistant larvae survived well on these two maize products. Performance of the two F1 populations on Cry1A.105 and Cry1F maize varied between the two test methods. In leaf tissue bioassay, Cry1Ab maize was marginally effective against the susceptible population. In contrast, few live larvae and little leaf injury from any of the five populations were observed on Cry2Ab2 and the three pyramided Bt maize products. The results of this study showed evidence of cross resistance of the Cry1A.105-resistant S. frugiperda to Cry1F and Cry1Ab maize, but not to the Bt maize products containing Cry2Ab2 or Vip3A. Data generated from this study will be useful in developing resistance management strategies for the sustainable use of Bt maize technology. |
| |
| Keywords: | Cry1A.105 Cry1F Bt maize Resistance management |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
