关键词: 褐家鼠, 灭鼠, 立克命, 杀鼠迷

Abstract: The aim of the study was to demonstrate an effetive method for the control of rats(Rattus norvegicus) on a large modern chicken farm.Racumin Tracking Powder (TP) with 0.75% coumatetralyl,a multiple dose anticoagulant was chosen because of its known effectiveness against rats and its low toxicity to birds.At first the farm was thoroughly inspected by night and day and signs of rat activity were documented.On the basis of the observations it was decided where to place 100 bait stations.The baitwas made of cock feed and Racumin TP mixed in the ratio 19: 1.Bait consuption was measureddaily and consumed bait was replaced.The infestation on the farm corresponded to about 11 kg baitconsumption daily when the trial was begun.The rats consumed 41.5 kg of bait during the period over 17 days.The infestation was reducedbelow 5% of the initial size after 10 days baiting.After 17 days the infestation was reduced below2.8%.No chickens or dogs were observed having symptoms of poisoning with an anticoagulantduring and after the experiment.The results emphasize that Racumin, TP is an effective rodenticide for rat control on farms.The mode of action of this anticoagulant has to be integrated in a system of pest management whichtakes into account the behaviour of the rats.