Abstract
Usually a poisonous bait for rat control is prepared with as large amount of poison as to kill a rat, even if a rat eats a part of the bait. However, in some cases, rats show a shyness of the bait so prepared, and also the bait is highly toxic to other animals. This study was made for the purpose to increase the rodenticidal effect of the bait by reducing the amount of poison, thallium sulphate, in each bait and increasing the bait consumptions of laboratory white mouse. Favourable results were obtaind by the use of bait containing 0.12% of thallium sulphate.
