INVESTIGADORES
CARPINELLA Maria Cecilia
artículos
Título:
Actividad biológica de extractos de Melia azedarach sobre larvas de Spodoptera eridania (Lepidoptera: Noctuidae)
Autor/es:
ROSSETTI, M.R.; M. T. DEFAGÓ; M. C. CARPINELLA; S. M. PALACIOS; G. VALLADARES
Revista:
REVISTA DE LA SOCIEDAD ENTOMOLóGICA ARGENTINA
Editorial:
Sociedad Entomológica Argentina
Referencias:
Lugar: Tucumán; Año: 2008 vol. 67 p. 115 - 125
ISSN:
0373-5680
Resumen:
ABSTRACT. In the course of searching for plant chemicals with potential
insecticide properties, the activity of Melia azedarach L. senescent leaf and ripe
fruit extracts (2, 5 and 10%) was evaluated on larvae of Spodoptera eridania
Cramer (Lepidoptera: Noctuidae). This polyphagous species is considered a
sporadic pest on many important crops. Food consumption was assessed and an
antifeedant index was calculated through choice tests. Also, food consumption,
larval mortality, weight and depositions were recorded and nutritional indices
were calculated in no-choice tests. Results from choice tests showed a strong
antifeedant effect of both extracts. In no-choice tests, the leaf and fruit extracts
strongly reduced food consumption and larval weight, except with fruit extract at
the lowest concentration. Larvae did not reach the pupal stage when high
concentrations of leaf or fruit extract were used. Antifeedant activity was
corroborated by nutritional indices, which also revealed negative effects of extracts
on relative consumption, growth rates and efficiency in utilization of ingested
and digested food, although digestibility was not affected. Our results suggest
that M. azedarach extracts could be incorporated in management programs for
this insect pest.