Isobutyl amides--potent compounds for controlling Diatraea saccharalis.
Pest Manag Sci
; 65(1): 47-51, 2009 Jan.
Article
em En
| MEDLINE
| ID: mdl-18785219
BACKGROUND: A dichloromethane-methanol extract of the seeds of Piper tuberculatum Jacq. (Piperaceae) and two isobutyl amides, 4,5-dihydropiperlonguminine (1) and pellitorine (2), which were isolated by chromatographic methods, were assayed for their lethality against the sugarcane borer Diatraea saccharalis F. (Lepidoptera: Pyralidae). RESULTS: Bioassays were carried out with fourth-instar caterpillars through topical application of test solutions to the dorsal surface of the prothorax, and dose-response correlations were determined. Significant insect mortalities were observed 24, 48 and 72 h after treatment at concentrations of >or= 100 microg insect(-1). The LD(50) and LD(90) values for compound 1 were 92.83 and 176.50 microg insect(-1), and for compound 2 they were 91.19 and 184.56 microg insect(-1). CONCLUSION: According to the LD(50) and LD(90) for compounds 1 and 2, it can be inferred that the values reflect an acute lethal response to both compounds, based on interaction(s) of the toxicants with a primary target or series of targets. Thus, the amides were demonstrated to have potential value in the control of the sugarcane borer.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Benzodioxóis
/
Alcamidas Poli-Insaturadas
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Ácidos Graxos Insaturados
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Amidas
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Inseticidas
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Mariposas
Limite:
Animals
Idioma:
En
Revista:
Pest Manag Sci
Assunto da revista:
TOXICOLOGIA
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido