Published

2007-01-01

Evaluación de isoespintanol aislado de Oxandra cf. xylopioides (ANNONACEAE) SOBRE Spodoptera frugiperda J.E. Smith (lepidoptera: noctuidae).

Keywords:

Isoespintanol, Control biológico, Spodoptera frugiperda, Oxandra cf xylopioides. (es)

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Authors

  • Benjamín Alberto Rojano
  • Sergio Andrés Montoya Martínez
  • Francisco Yépez Rodríguez
  • Jairo Sáez Vega
Se evaluó el efecto biocida del isoespintanol extraído de Oxandra cf. xylopioides sobre el gusano cogollero del maíz, Spodoptera frugiperda. El isoespintanol fue usado a concentraciones de 100 300 900 y 2700 ppm y aplicado por inmersión de hojas de maíz evaluando sobre larvas del segundo instar. Se determinó el porcentaje de mortalidad a las 24, 48 y 72 horas y se calculó la DL50 y DL90; el análisis de mortalidad demostró que el isoespintanol tiene un efecto tóxico, siendo la dosis de 2700 ppm la que presenta mayor mortalidad. Se determinó una DL50 de 147,07 ppm y una DL90 de 1394 ppm a las 48 horas postratamiento. Estos resultados permitirán avanzar en el estudio y aplicación de insecticidas biológicos para el manejo integrado de plagas.

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