In this study, the author tested the effects of dipotassium phosphate（DKP）, which has been shown to affect the feeding of the subterranean termite Coptotermes formosanus Shiraki in laboratory tests, by adapting into a bait system used in the field. In the test, Kimtowel was impregnated with DKP, with concentrations of 1, 5 and 10w/w％, and was adopted to Sentricon station of Sentricon system^TM. And then, the stations were embedded into the ground nearby nest of C. formosanus in the field. The supply of DKP induced a significant positive effect on feeding amounts, increasing to 1.7（1w/w％DKP）, 1.5（5w/w％DKP）, and 1.7（10w/w％DKP）-fold, respectively. However, no significant difference was observed between the feeding amounts of baits treated with each DKP concentration, unfortunately. The result suggests DKP is able to be adapted to the bait system and improve the bait and termiticide feeding of them. The addition of DKP will allow a decrease in the usage of insecticides which can be expected to develop the less-chemical termite control.