| Registro completo |
| Provedor de dados: |
Neotropical Entomology
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| País: |
Brazil
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| Título: |
Influence of parasitism by Chelonus insularis Cresson (Hymenoptera: Braconidae) on the susceptibility of Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) to insecticides
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| Autores: |
Zenner,Ingeborg
Álvarez,Alonso
Barreto,Sandra
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| Data: |
2006-12-01
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| Ano: |
2006
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| Palavras-chave: |
Fall armyworm
Egg-larval parasitoid
Insecticide resistance
Integrated pest management
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| Resumo: |
The egg-larval parasitoid Chelonus insularis Cresson is a key parasitoid of the fall armyworm Spodoptera frugiperda (J. E. Smith) during the second field generation in the upper Magdalena River Basin, Colombia. In spite of selection pressure, the higher susceptibility of the second generation fall armyworm larvae to insecticides, compared with that of the first generation, suggests that the parasitism may be responsible for the apparent difference in susceptibility. Parasitized and non-parasitized 2nd-instar larvae of the fall armyworm were tested for susceptibility to chlorpyriphos, methomyl, cypermethrin, and Bacillus thuringiensis in the laboratory, using the leaf dip test. Parasitized larvae were up to 3.93 times more susceptible to chlorpyriphos, 3.71 times to methomyl, and 14.11 times to cypermethrin than non-parasitized larvae. The least effect of parasitism on susceptibility was found for B. thuringiensis. We discuss the negative influence of synthetic insecticide on the parasitoid population dynamics and its impact on insecticide resistance.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000600015
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| Editor: |
Sociedade Entomológica do Brasil
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| Relação: |
10.1590/S1519-566X2006000600015
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| Formato: |
text/html
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| Fonte: |
Neotropical Entomology v.35 n.6 2006
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| Direitos: |
info:eu-repo/semantics/openAccess
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