Publication

Abstract : Seven coumarin derivatives have been isolated from the n-hexane and methano1 extracts of aerial part of Atalandia racemosa Wgi ht and Am. (Rutaoeae) and tested for antifetedan activity against Spodoptera litura F. larvae. Among these, xanthotoxin ia the most active and luvangetin is moderately active, while xanthyletin and racemoain are active only at higher concentrations. Rutarin, rutaretin, and umbelliferone failed to cause feeding inhibition even at a oonoentralion of 1000 ppm. Antifeedant activities of 17 other structurally related coumarins have also been studied, to establish structure-activity relations.