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Field trials of calciferol combined with warfarin against wild house-mice (Mus musculus L.)*

Published online by Cambridge University Press:  15 May 2009

F. P. Rowe
Affiliation:
Pest Infestation Control Laboratory, Ministry of Agriculture, Fisheries and Food, Hook Rise South, Tolworth, Surbiton, Surrey
F. J. Smith
Affiliation:
Pest Infestation Control Laboratory, Ministry of Agriculture, Fisheries and Food, Hook Rise South, Tolworth, Surbiton, Surrey
T. Swinney
Affiliation:
Pest Infestation Control Laboratory, Ministry of Agriculture, Fisheries and Food, Hook Rise South, Tolworth, Surbiton, Surrey
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A combination of calciferol (vitamin D2) and warfarin, each at 0·025% in medium oatmeal bait, failed to control six of seven house-mouse (Mus musculus L.) populations infesting urban and farm buildings. In three further treatments with both calciferol and warfarin at 0·05 % in dehusked canary seed bait plus 5% corn oil, mortality, estimated from the consumption of pre- and post-treatment census bait, ranged between 94·2 and 97·4%. Finally, among sixteen treatments done with calciferol at 0·1% and warfarin at 0·025% in various cereal baits, the best results (97·0–100%) were obtained in six treatments where the bait-base was whole canary seed; this was so whether the poison bait was applied directly or after a 3-day pre-baiting period. It is concluded that calciferol at 0·1 % plus warfarin at 0·025 % is an effective combination against house-mice, especially when used with whole canary seed. The role played by warfarin in the poison mixture needs to be investigated further.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1974

References

REFERENCES

Gbeaves, J. H., Rednern, R. & King, R. E. (1974). Some properties of calciferol as a rodenticide. Journal of Hygiene 73, 345–51.Google Scholar
Rowe, F. P. & Redfeen, R. (1968). Laboratory studies on the toxicity of anticoagulant rodenticides to wild house mice (Mus musculus L.). Annais of Applied Biology 62, 355–61.CrossRefGoogle Scholar