The Department of Conservation plans to carry out a 1080 poison drop in Egmont National Park in the next few weeks.
The drop will be co-ordinated with the efforts of a local trapper who has a permit to trap possums in the Kaitake Ranges in the park.
DOC said it was hoping the aerial operation, together with the trapper's work, will avoid the need for another aerial drop planned in the ranges in several years.
The department said it was keen to work with community groups to help control introduced pests.
