Data/hora: 13/06/2024 12:25:22

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 26/08/2010
Data da última atualização: | 04/06/2018
Autoria: | TAVARES, W. S.; COSTA, M. A.; CRUZ, I.; SILVEIRA, R. D.; SERRAO. J. E.; ZANUNCIO, J. C.
Afiliação: | WAGNER DE SOUZA TAVARES, UFV; MARIANA ABREU COSTA, BOLSISTA CNPMS; IVAN CRUZ, CNPMS; RODRIGO DINIZ SILVEIRA, UFVJM; JOSE EDUARDO SERRÃO, UFV; JOSE COLA ZANUNCIO, UFV.
Título: | Selective effects of natural and synthetic insecticides on mortality of Spodoptera frugiperda (Lepidoptera: Noctuidae) and its predator Eriopis connexa (Coleoptera: Coccinellidae).
Ano de publicação: | 2010
Fonte/Imprenta: | Journal of Environmental Science and Health. Part B. Pesticides, Food Contaminants and Agricultural, New York, v. 45, n. 6, p. 557-561, 2010.
DOI: | 10.1080/03601234.2010.493493
Idioma: | Inglês
Conteúdo: | Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) is a serious pest of corn in several American countries. It is mainly controlled with synthetic insecticides. The objectives of this study were to evaluate the effects of the natural products, neem oil and pyroligneous extract, and the synthetic insecticide, lufenuron, at 2.50mL water (0.25 %) on the mortality of 2-, 4- and 6-day-old caterpillars of S. frugiperda, and their selectivities against fourth instar larvae of Eriopis connnexa Germar (Coleoptera: Coccinellidae). Four- and 6-day-old S. frugiperda caterpillars showed higher mortality after exposure to neem oil (83.33 ± 0.83 and 89.58 ± 0.90 %, respectively) and lufenuron (95.83 ± 0.96 and 85.41 ± 0.83 %), compared to pyroligneous extract (68.75 ± 0.69 and 31.25 ± 0.31 %). The deleterious effect of pyroligneous extract was higher in 2- (83.33 ± 0.83 % mortality) and 4-day-old (68.75 ± 0.69 %) S. frugiperda caterpillars than in 6-day-old caterpillars (31.25 ± 0.31 %). Larval mortality of the predator E. connexa was lower with neem oil and pyroligneous extract (25.00 ± 0.33 %) than with lufenuron (91.66 ± 1.22 %). Neem oil is thus recommended for control of S. frugiperda because of its high toxicity, combined with its relatively low toxicity to larvae of the natural enemy E. connexa.
Palavras-Chave: | Eriopis connnexa; Pyroligneous extract.
Thesagro: | Spodoptera Frugiperda; Zea Mays.
Thesaurus Nal: | azadirachtin; Coccinellidae; Lepidoptera; lufenuron; mortality; neem oil.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (23006-1) - UPC - AP - DD -  -  -  - DIS