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Resistance of Spodoptera frugiperda (Lepidoptera: Noctuidae) to spinetoram: inheritance and cross-resistance to spinosad.
Lira, Ewerton C; Bolzan, Anderson; Nascimento, Antonio Rb; Amaral, Fernando Sa; Kanno, Rubens H; Kaiser, Ingrid S; Omoto, Celso.
Afiliação
  • Lira EC; Department of Entomology and Acarology, University of São Paulo (ESALQ/USP), São Paulo, Brazil.
  • Bolzan A; Department of Entomology and Acarology, University of São Paulo (ESALQ/USP), São Paulo, Brazil.
  • Nascimento AR; Department of Entomology and Acarology, University of São Paulo (ESALQ/USP), São Paulo, Brazil.
  • Amaral FS; Department of Entomology and Acarology, University of São Paulo (ESALQ/USP), São Paulo, Brazil.
  • Kanno RH; Department of Entomology and Acarology, University of São Paulo (ESALQ/USP), São Paulo, Brazil.
  • Kaiser IS; Department of Entomology and Acarology, University of São Paulo (ESALQ/USP), São Paulo, Brazil.
  • Omoto C; Department of Entomology and Acarology, University of São Paulo (ESALQ/USP), São Paulo, Brazil.
Pest Manag Sci ; 76(8): 2674-2680, 2020 Aug.
Article em En | MEDLINE | ID: mdl-32133753
BACKGROUND: The use of spinosyn insecticides is one of the major control strategies of the fall armyworm, Spodoptera frugiperda (J. E. Smith) in Brazil. In this study, we selected a spinetoram-resistant strain from a field-population of S. frugiperda to characterize the inheritance of the resistance and cross-resistance relationship between spinosyn insecticides. RESULTS: The values of LC50 (95% CI) obtained from concentration-response bioassays were 0.63 (0.55-0.73) µg spinetoram mL-1 for the susceptible strain (SUS), and 1170.96 (1041.61-1323.89) µg spinetoram mL-1 for the strain resistant to spinetoram (SPT-R). These values resulted in a resistance ratio of 1844-fold. The SPT-R strain showed cross-resistance with spinosad (resistance ratio = 1196-fold). The reciprocal crosses showed LC50 values of 3.91 (2.97-5.84) and 5.37 (4.52-6.52) µg spinetoram mL-1 , suggesting that the resistance of S. frugiperda to spinetoram is autosomal and incompletely recessive. The backcrosses of the F1 progeny with the SPT-R strain suggest a resistance with polygenic effect. Estimates of the effective number of loci with equal contributions to the resistance effect were from 1.18 to 1.76, suggesting that resistance to spinetoram is associated with a few genes. CONCLUSION: The inheritance pattern of resistance of S. frugiperda to spinetoram was characterized as autosomal, incompletely recessive and polygenic. Cross-resistance between spinosyns was confirmed in S. frugiperda. The importance of this information for implementing insect resistance management strategies is discussed in this paper. © 2020 Society of Chemical Industry.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Spodoptera Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Pest Manag Sci Assunto da revista: TOXICOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Spodoptera Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Pest Manag Sci Assunto da revista: TOXICOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido