While he acknowledged there was some controversy over the use of 1080 in New Zealand, "at the moment 1080 is still the best toxic treatment."
Far North Forest and Bird chairman Dean Baigent-Mercer hails 1080 with saving forests where it is used. "The native forests in Northland that receive biodegradable 1080 aerial baits are the few of our forests not in freefall collapse. Volunteer trapping projects, although excellent, only cover a tiny proportion of Northland's native forests," Mr Baigent-Mercer said.
The overall impacts of using biodegradable 1080 are significant and positive and DoC deserved congratulations for its use, he said. Ideally, the targeted species - rat, stoats and possums - should be hit every three years, Mr Archbold said.
Rats in particular have increased at an alarming rate this year, with tracking tunnels showing a record high rate of 80 per cent. The past highest rate was 46 per cent.