Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Fall Armyworm Strains (Lepidoptera: Noctuidae) in Argentina, Their Associate Host Plants and Response to Different Mortality Factors in Laboratory

Eduardo G. Virla, Analía Álvarez, Flavia Loto, Licia M. Pera and Mario Baigorí
The Florida Entomologist
Vol. 91, No. 1 (Mar., 2008), pp. 63-69
Stable URL: http://www.jstor.org/stable/20065929
Page Count: 7
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Fall Armyworm Strains (Lepidoptera: Noctuidae) in Argentina, Their Associate Host Plants and Response to Different Mortality Factors in Laboratory
Preview not available

Abstract

The aim of this research was to identify the existence of different Spodoptera frugiperda (J. E. Smith) (FAW) host strains in Argentina, and to determine their behaviors in the presence of different mortality factors. Populations belonging to these strains were tested with the pesticides chlorpyriphos and cypermethrin, transgenic corn germplasms expressing Cry proteins 1Ab or 1F, and an indigenous Bacillus thuringiensis strain. The relation of these strains with the host plant species and crop utilization, subsistence or commercial ones, is discussed. The response to the assayed insecticides, Bt transgenic corn and Bt suspension was diverse, showing wide variability in mortality rates. This research validates the need of intensive studies relating resistance phenomena with the differential behavior of the host strains inhabiting Argentina. Host plant and crop utility is not a determinant for the identity of the colonizing strain, so molecular identification of the strains is highly recommended before study of any aspect of the FAW in Argentina./// El objetivo de esta investigación fue establecer la existencia de diferentes líneas o cepas del cogollero del maíz, Spodoptera frugiperda (J. E. Smith), en Argentina, y determinar su comportamiento frente a diversos factores de mortalidad. Poblaciones correspondientes a diferentes cepas fueron testadas con los insecticidas clorpirifos y cipermetrina, maíces transgénicos que expresan las proteínas Cry 1Ab y 1F, y una cepa nativa de Bacillus thuringiensis. Se discute la relación entre las cepas, las plantas desde donde fueron colectadas y el objectivo agrícola del cultivo, subsistencia o comercial. La respuesta a los insecticidas, maíces Bt transgénicos y a la suspensión de Bt fue diversa, mostrando una amplia variabilidad en las tasas de mortalidad. Esta investigación exhorta la necesidad de intensificar estudios relacionados a los fenómenos de resistencia, y a determinar el comportamiento diferencial de las cepas del cogollero que afectan cultivos en Argentina. La planta hopedadora y el tipo de cultivo no es determinante de la identidad de la cepa que lo coloniza, por lo que es altamente recomendable realizar la identificación de las mismas mediante técnicas moleculares antes de estudiar cualquier aspecto relacionado a esta especie plaga en Argentina.

Page Thumbnails

  • Thumbnail: Page 
63
    63
  • Thumbnail: Page 
64
    64
  • Thumbnail: Page 
65
    65
  • Thumbnail: Page 
66
    66
  • Thumbnail: Page 
67
    67
  • Thumbnail: Page 
68
    68
  • Thumbnail: Page 
69
    69