The Department of Conservation's plan for a 1080 aerial drop in public and private forests in the Far North later this year is meeting growing resistance.
Critics say use of the poison over more than 60 years has had devastating effects on wildlife, killing indiscriminately, inflicting an "extremely cruel and inhumane death" that often takes days. Locals for Responsible Conservation also argue that it poisons water, including sources used by people.
"Poisoned animals are left to rot in the forest and waterways, and remain toxic for many, many months," a spokesman said.
"Dropping deadly poison over our environment is not an acceptable practice, and it is not sustainable.
"There are many alternatives that contribute positively to our communities and our employment opportunities that do not risk our health and our environment.