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Open Access Publications from the University of California

Efficacy tests of different rodenticides on some species of rats in Thailand

  • Author(s): Tongtavee, Kasem
  • et al.

Two acute rodenticides, zinc phosphide and Vacor, at different concentrations were tested on the rice field rats (Rattus argentiventer) and the bandicoot rats (Bandicota indica) with a choice-feeding procedure. It was found that zinc phosphide at 0.5%, 0.8%, 1.6% caused 30%, 30%, and 60% mortality, respectively, to R. argentiventer, and at 1.6% caused death only 30% to B. indica, whereas Vacor at 0.5%, 0.8%, 1.6% caused 70%, 60% and 80% mortality, respectively to R. argentiventer and this compound at 1.6% killed 60% of B. indica. Five anticoagulants, Actosin-P, warfarin, Racumin, brodifacoum, and chlorophacinone also were tested on R. argentiventer and only brodifacoum was tested on B. indica at an appropriate concentration with a non-choice feeding procedure. It was found that with-one day consumption of the poisoned bait brodifacoum 0.005% is the only anticoagulant that caused 100% mortality to R. argentiventer and B. indica, whereas, Actosin-P, warfarin, Racumin, and chlorophacinone killed 20%, 20%, 30%, and none of R. argentiventer, respectively.

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