Baits brodifacoum

When ARs have been used to control rodents and vertebrate predators in conserved areas, there have been instances of both primary and secondary poisoning. In New Zealand, such incidents have been observed on islands where bait treated with brodifacoum has been used. Casualties have included native raptors, such as the Australasian harrier (Circus approximans) and morepork (Ninox novaeseelaniae), as well as other species, such as the pukeko. Western weka (Galliralus australis), and... 

Hegdal, P.L. and Colvin, B.A. (1988). Potential hazard to Eastern Screech owls and other raptors of brodifacoum bait used for vole control in orchards. Environmental Toxicology and Chemistry 7, 245-260. 

An even more important derivative is 3-[3-(4 -bromobiphenyl-4-yl)-1,2,3,4-tetrahydronaphth-l-yl]-4-hydroxycoumarin (brodifacoum, 35). This anticoagulant of exceptional potency is capable of control resistant rodents as well as several noncommensal species. Contrary to first generation anticoagulants, a bait concentration of only SO mg/kg brodifacoum is adequate to give control even in a single feeding for most species. As with other anticoagulants, vitamin K, is an effective antidote. In contrast with other acute rodenticides, symptoms are delayed and no bait shyness is observed (Dubock and Kaukeinen, 1978). Its effectiveness... 

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