The susceptibility of the white peach scale, Pseudaulacaspis pentagona (Targioni) (Hemiptera: Diaspididae) to pesticide was evaluated by potato tuber dipping method. Among nine pesti­cides tested on the white peach scale eggs, chlorpyrifos, DMTP (methidathion), pyriproxyfen, buprofezin, chlorfenapyr, and pyri­fluquinazon caused high mortality. Among the 15 pesticides testedon first instar larvae, chlorpyrifos, DMTP (methidathion), fenpropathrin, pyriproxyfen, machine oil emulsion and chlorfenapyr were more toxic. Among the nine pesticides tested on second instar larvae, no pesticides were effective.