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Age is discussed as a factor in the susceptibility of animals to iodenticides such as strychnine, ANTU, anticoagulants, arsenic, crimidine, endrin, barium carbonate, and chemosterilants. Age-differential mortality will be of importance if the difference is great enough and if baits cannot be strengthened without the loss of bait acceptance. Some possible implications of these age-related differences to actual rodent control practices and to laboratory and field efficacy tests are discussed. Agerelated toxicity differences of some rodenticides to certain nontarget species are included for practical and comparative purposes. Age-specific toxicity tests are suggested. The authors speculate that age-related behavioral traits may play an independent role or compound an age-toxicity association.
vertebrate pest control, rodenticides, age, susceptibility, resistance, tolerance, toxicity, efficacy tests, testing, strychnine, ANTU, anticoagulants, arsenic, crimidine, endrin, barium carbonate, chemosterilants, rats, mice, Rattus norvegicus, Rattus rattus, Mus musculus
extension wildlife specialist (Animal Damage), University of California, Davis, Calif
Specialist in vertebrate ecology, University of California, Davis, Calif