The objectives of the present study were to investigate phytochemical composition essential oils (EO) from rhizomes Acorus calamus collected Jorhat, Assam; Munsyari and Pantnagar, Uttarakhand, India. EOs studied for different pesticidal activities viz; nematicidal, insecticidal, herbicidal activity. To synergistic effect on activity, four combinations prepared. Phenylpropanoids with β-asarone a...