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Insecticide resistance and size assortative mating in females of the maize weevil (Sitophilus zeamais).
Cordeiro, Erick Mauricio G; Corrêa, Alberto S; Rosi-Denadai, Conrado A; Tomé, Hudson Vaner V; Guedes, Raul Narciso C.
Afiliação
  • Cordeiro EM; Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
  • Corrêa AS; Department of Entomology, Kansas State University, Manhattan, KS, USA.
  • Rosi-Denadai CA; Departamento de Entomologia e Acarologia Agrícola, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo (ESALQ-USP), Piracicaba, SP, Brazil.
  • Tomé HV; Departamento de Entomologia e Acarologia Agrícola, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo (ESALQ-USP), Piracicaba, SP, Brazil.
  • Guedes RN; Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
Pest Manag Sci ; 73(5): 823-829, 2017 May.
Article em En | MEDLINE | ID: mdl-27624414
BACKGROUND: Random mating is a common assumption in studies of insecticide resistance evolution, but seldom tested despite its potential consequences. Therefore, the existing evidence of female choice and insecticide resistance in populations of the maize weevil (Sitophilus zeamais), a key pest of stored cereals, led to the assessment of mating preferences and their association with insecticide resistance in this species. RESULTS: Mixed lines of a maize weevil colony were established from field-collected populations, which after 5 months of natural breeding were selected for deltamethrin resistance for five generations, reaching over 100-fold resistance. Mating preference was significantly based on the partner size, measured as body mass (χ2 = 5.83, df = 1, P = 0.016). Susceptible females preferred heavier males for mating (χ2 = 5.83, df = 1, P = 0.015), a trait that was more frequently associated with deltamethrin resistance (χ2 = 7.38, df = 1, P = 0.007). Deltamethrin resistance compromised daily fertility, although the reduced offspring production observed in matings between susceptible females and resistant males was negligible. CONCLUSION: Susceptible female weevils prefer larger (and heavier) males to mate, a trait associated with deltamethrin resistance, favouring the maintenance and spread of the resistant phenotype in the population. © 2016 Society of Chemical Industry.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Sexual Animal / Resistência a Inseticidas / Gorgulhos / Tamanho Corporal Limite: Animals Idioma: En Revista: Pest Manag Sci Assunto da revista: TOXICOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Sexual Animal / Resistência a Inseticidas / Gorgulhos / Tamanho Corporal Limite: Animals Idioma: En Revista: Pest Manag Sci Assunto da revista: TOXICOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido