Cipadessa baccifera Miq., Melia dubia (Cav.) (Meliaceae); Clausena dentata (Rutaceae) and Dodonaea angustifolia (Sapindaceae) are common medicinal plants found in Western Ghats and are used traditionally for various purposes. The petroleum ether, chloroform, hexane, acetone and water extracts of the leaves were investigated for their ovicidal property against Helicoverpa armigera (Hubner) (Lepidoptera : Noctuidae). The different extracts of the test plants differed significantly in their efficacy. Among the four plants tested for ovicidal activity, Clausena dentata reduced the egg hatchability and proved to be highly ovicidal compared to others. Among the age of eggs, it was clear that the early stage of the eggs namely 24 h old eggs, to be highly susceptible to all the treatments.