Sarmah, M.Basit, A.Bhattacharyya, BadalRahman, A.Gurusubramanian, G.Jain, N.K.2008-12-192008-12-192007Sarmah, M, Basit, A, Bhattacharyya, B, Rahman, A & Gurusubramanian G 2007, ' Ovicidal, acaricidal and growth inhibitory activity of Xanthium strumarium L., Acorus calamus L., and Pongamia pinnata L. (Pierre) against a major pest of tea, Oligonychus coffeae Nietner (Tetranychidae : Acarina)', International Journal of Tea Science, vol. 6, no. 3, pp. 1-14.0972-544Xhttp://hdl.handle.net/2263/8485This item was scanned with a HP 4850 Scanjet at 300 dpi and consists of 14 pages.Ovicidal, post-embryonic development and adulticidal activity of petroleum ether, acetone and methanol fractions of Xanthium strumarium (L.), Acorus calamus (L.), and Pongamia pinnata (Pierre), prepared by following sequential extraction method, against the tea red spider mite, Oligonychus coffeae Nietner (Acarina: Tetranychidae) were determined by employing direct exposure method under laboratory conditions. Responses in terms of reduction in egg hatchability, larval-nymphal mortality, adult emergence and mortality of adults varied according to solvent fractions tested, their concentration and developmental stage of the insect. All the solvent fractions of A. calamus and methanolic fraction of X. strumarium possess the property of killing eggs but no ovicidal action was noticed in P pinnata. All the plant extracts adversely affect the postembryonic development as well as adult of red spider mite. The plant extracts described herein merit further study as potential miticides for 0.coffeae control in tea ecosystem.enInternational Society of Tea Science (ISTS)Camellia sinensisOligonychus coffeaeSolvent fractionXanthium strumariumAcorus calamusPongamia pinnataOvicidal developmentGrowth inhibitory activityTea -- Diseases and pests -- ControlAcaricidesSpider mites -- ControlArticle