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Laboratory and field survival of Spodoptera frugiperda (Lepidoptera: Noctuidae) on Bt and non-Bt maize and its susceptibility to insecticides.
Muraro, Dionei S; Garlet, Cinthia G; Godoy, Daniela N; Cossa, Gisele E; Rodrigues Junior, Gerson L Dos S; Stacke, Regis F; Medeiros, Sandro Lp; Guedes, Jerson Vc; Bernardi, Oderlei.
Afiliação
  • Muraro DS; Department of Plant Protection, Federal University of Santa Maria, Santa Maria, Brazil.
  • Garlet CG; Department of Plant Protection, Federal University of Santa Maria, Santa Maria, Brazil.
  • Godoy DN; Department of Plant Protection, Federal University of Santa Maria, Santa Maria, Brazil.
  • Cossa GE; Department of Plant Protection, Federal University of Santa Maria, Santa Maria, Brazil.
  • Rodrigues Junior GLDS; Department of Plant Protection, Federal University of Santa Maria, Santa Maria, Brazil.
  • Stacke RF; Department of Plant Protection, Federal University of Santa Maria, Santa Maria, Brazil.
  • Medeiros SL; Department of Plant Science, Federal University of Santa Maria, Santa Maria, Brazil.
  • Guedes JV; Department of Plant Protection, Federal University of Santa Maria, Santa Maria, Brazil.
  • Bernardi O; Department of Plant Protection, Federal University of Santa Maria, Santa Maria, Brazil.
Pest Manag Sci ; 75(8): 2202-2210, 2019 Aug.
Article em En | MEDLINE | ID: mdl-30666779
BACKGROUND: Field-evolved resistance of fall armyworm (FAW), Spodoptera frugiperda (Smith), has been reported to Bt maize technologies in Brazil. The control failures of FAW by Bt maize increased the use of insecticides for their control. However, no information is available on the interaction between resistant FAW and their response to insecticides. Here, we evaluated the survival of FAW strains on Bt and non-Bt maize in laboratory and field conditions, and their susceptibility to insecticides. RESULTS: In the laboratory, resistant FAW larvae reared on Bt and non-Bt maize showed a similar susceptibility to spinetoram (LC50 = 0.16-0.18 µg a.i. cm-2 ) and chlorfenapyr (LC50 = 0.17-0.20 µg a.i. cm-2 ). However, their susceptibility was lower than that of the susceptible strain reared on non-Bt maize: LC50 = 0.05 (spinetoram) and 0.08 (chlorfenapyr) µg a.i. cm-2 . In contrast, heterozygous strains had similar susceptibility to the susceptible strain. In field trials, no differences in FAW survival were detected between strains when the commercial dose of two insecticides was applied in Bt and non-Bt maize. CONCLUSION: FAW strains surviving on Bt and non-Bt maize, at the same development stage, have similar susceptibility to insecticides. The integrated pest management practices and insect resistance management importance of these results are discussed. © 2019 Society of Chemical Industry.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Proteínas de Bactérias / Resistência a Inseticidas / Spodoptera / Zea mays / Endotoxinas / Proteínas Hemolisinas / Inseticidas Limite: Animals Idioma: En Revista: Pest Manag Sci Assunto da revista: TOXICOLOGIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
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XML
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Proteínas de Bactérias / Resistência a Inseticidas / Spodoptera / Zea mays / Endotoxinas / Proteínas Hemolisinas / Inseticidas Limite: Animals Idioma: En Revista: Pest Manag Sci Assunto da revista: TOXICOLOGIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido