Abstract

ROJANO, Benjamín Alberto; MONTOYA MARTINEZ, Sergio Andrés; YEPEZ RODRIGUEZ, Francisco  and  SAEZ VEGA, Jairo. EVALUATION OF ISOESPINTANOL ISOLATED FROM  Oxandra cf. xylopioides (ANNONACEAE) ON Spodoptera frugiperda J.E. SMITH (LEPIDOPTERA: NOCTUIDAE). Rev. Fac. Nac. Agron. Medellín [online]. 2007, vol.60, n.1, pp.3691-3702. ISSN 0304-2847.

The biocide effect of isoespintanol extracted from Oxandra cf xylopioides was evaluated on the corn earworm Spodoptera frugiperda. Isoespintanol at concentrations of 100 300 900 and 2700 ppm was applied by foliar immersion of maize leaves and it was evaluated on larvae of the second instar. Percentage of mortality at 24, 48 and 72 hours was determined and calculated its DL50 and DL90; the mortality analysis demonstrated that compound has toxic effects, being the dose 2700 ppm the one that presented great mortality. A dose DL50 of 147.07 ppm and a DL90 of 1394 ppm to the 48 hours postreatment was determined. These results will allow to advance in the study and application of biological insecticides directed to the integrated handling of plagues.

Keywords : Isoespintanol; biological control; Spodoptera frugiperda; Oxandra cf xylopioides.

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