Palatability of bird repellents to Rattus norvegicus

Pest Manag Sci. 2001 Jul;57(7):615-9. doi: 10.1002/ps.335.


The palatability to captive, mostly laboratory-bred, Norway rats (Rattus norvegicus) of cereal-based baits containing 0.02 g kg-1 brodifacoum, with and without bird-repellent additives, was compared in a no-choice experimental design. Methyl anthranilate (25 g kg-1), dimethyl anthranilate (25 g kg-1) and cinnamamide (2.5 g kg-1) reduced bait consumption by the rats, but all except one rat ate enough bait to receive a lethal dose. Cinnamamide (1 g kg-1), ortho-aminoacetophenone (0.1 g kg-1) and tannic acid (20 g kg-1) did not reduce bait consumption and all rats died after eating baits. The concentration of cinnamamide palatable to rats has only a low and short-lived repellency to birds, so it does not warrant further investigation. However, ortho-aminoacetophenone and tannic acid should now be field-tested for palatability to all three rat species in New Zealand and for repellency to native New Zealand birds.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • 4-Hydroxycoumarins / toxicity*
  • Acetophenones / toxicity
  • Animals
  • Birds
  • Cinnamates / toxicity
  • Food Additives
  • Hydrolyzable Tannins / toxicity
  • Pesticides
  • Pheromones / toxicity
  • Rats
  • Rodenticides / toxicity*
  • ortho-Aminobenzoates / toxicity


  • 4-Hydroxycoumarins
  • Acetophenones
  • Cinnamates
  • Food Additives
  • Hydrolyzable Tannins
  • Pesticides
  • Pheromones
  • Rodenticides
  • ortho-Aminobenzoates
  • 2-aminoacetophenone
  • methyl anthranilate
  • bromfenacoum
  • cinnamamide