efficacy

When meat baits containing PAPP are applied in bait stations in field settings, stoat and feral cat numbers can be rapidly reduced. However, there has been limited practical experience with PAPP to date, especially when compared with alternative tools such as traps or sodium monofluoroacetate (1080) baits. Additional practical experience should enable the effective use of PAPP as a tool to help protect native species from introduced predators. In the future, PAPP will be developed in long-life bait and in a resetting toxin delivery system.

Zinc phosphide (Zn₃P₂) has been used overseas as a vertebrate pest control tool for several decades. It has been favoured in the USA and Australia for the field control of rodents and other animal pest species because of its comparatively low risk of secondary poisoning and lack of environmental persistence. Zn₃P₂ paste was approved for use as a possum control agent in New Zealand by the Environmental Protection Authority in August 2011.