Antifeedant and insecticidal properties of thirty plants suggested by the tribes of Andaman and Nicobar Islands were studied by conducting laboratory bioassay against third instar of Scirpophaga incertulas (W.) (Lepidoptera). The higher antifeedant activity was noticed in Annona muricata L. (Magnoliales) (82.97%), Amomum fenzlii K. (Zingiberales) (82.11%) and Oroxylum indicum V. (Lamiales) (81.66%). Insecticidal activity was more pronounced in Derris scandens B. (Fabales) (66.66%) and Tetracera sarmentosa L. (Dilleniales) (53.33%).