Paranagama, P.Ekanayake, E.M.D.S.2010-07-062010-07-062004Journal of the National Science Foundation of Sri Lanka, 32(1 and 2):p.1-12https://dl.nsf.gov.lk/handle/1/6026Alpinia calcarataEssential oilsPeriplanata americanaInsect pestsInsect repellantsPhytochemistryBiological SciencesRepellant properties from essential oil of Alpinia calcarata Rosc. against the American cockroach, Periplanata americanaArticle