Laboratory evaluation of difenacoum as a rodenticide.
The efficacy of difenacoum as a new anticoagulant rodenticide was evaluated by blood coagulation studies and laboratory feeding tests using warfarin-resistant and non-resistant common rats (Rattus norvegicus), ship rats (R. rattus) and house mice (Mus musculus). Prothrombin assays indicated that the compound had as marked an activity with warfarin-resistant common rats as coumatetralyl had with non-resistant animals. Feeding tests confirmed that 0-005% would be a near-optimal concentration for field use, although there was some evidence of unpalatability. Results with ship rats and house mice were less favourable. Trials with enclosed colonies of warfarin-resistant mice confirmed the laboratory finding that although difenacoum was more effective than all other currently used anticoagulants, it was unlikely to give complete control. It is concluded that difenacoum is a valuable new rodenticide, especiaaly for controlling warfarin-resistant common rats.[1]References
- Laboratory evaluation of difenacoum as a rodenticide. Hadler, M.R., Redfern, R., Rowe, F.P. The Journal of hygiene. (1975) [Pubmed]
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