关键词: 抗凝血灭鼠剂, 抗药性, 拒食性

Abstract: From Mar.1986 till Nov.1995, the author had been making a study on the effects of anticoagulant rodenticides for a continued use of ten year in the residential quarters in Changsha Islet,boyang County.The study was made by oborving the rodents population density and the rodents'anticoagulant resistance.The observation came to the result that in the early period of the ten years there was a notable effects while in the later period the effects fell year by year.The followings are the main factors for the fall: rodents' bait shyness and endurance to the antiequlant rodenticides developed over the period; the variation in rodents species comopsition- the rise of the species which is more endurable to rodenticides in the rodents population compeition and the fall of the more vulnerable species.The author holds that attention should be given to the environmental sanitation in addition to the use of anticogulant rodeticides.In order to get the rodent poPulation under control, we have to minimize the source offood & shelter available to rodents in the environment.