An investigation of the rat pest problem in Queensland canefields: 3. Laboratory experiments on food intake and toxicity

Abstract

Methods for the initial cage test evaluation of bait bases, poisons, poisoned foods and baits for Queensland canefield rats are described. Mean standard intake and median lethal dose, either singly or conjointly, are used as criteria. Whole grain, such as that of wheat or oats, is the most efficient food bait base. Thallous sulphate and yellow phosphorous are considered to be suitable poisons. Arsenic, barium carbonate, barium chloride, red squill, and strychnine are unsatisfactory for various reasons. The addition of flavourings and/or attractants does not increase the intake or a particular poisoned food by individual rats; this can be varied only by altering the poison strength.