Acaricidal Activities of Parthenium hysterophorus L. against Red Spider Mite, Oligonychus Coffeae Nietner (Acarina: Tetranychidae) of Tea

The different solvent extracts (viz. Petroleum ether, Chloroform and Methanol) obtained from the leaves of Parthenium hysterophorus L. were tested for acaricidal effects against Oligonychus coffeae Nietner (Acarina Tetranychidae). The methanol extract showed highest mortality against the adults of O. coffeae followed by petroleum ether and chloroform extracts. The LC50 value of methanol extract against the adult mite was 0.12 % (48h). No mortality was observed in control. Thus methanol extract of Parthenium hysterophorus is known to be a promising source for the controlling of Oligonychus coffeae.