Allocated $142,500 by the New Zealand Lottery Grants Board, the group tendered the work to contractors in what was the first organised possum-control project on the peninsula, Mr Wilson said.
The work started on March 1 and contractors had covered Cape Saunders (1600ha) and moved to Taiaroa Head (2200ha), which would take up to another two weeks.
Clarks-Sheppards Hill Pivot areas would also be targeted.
As possums there did not have Tb, probably due to the area's isolation, the peninsula had not been targeted by possum-control bodies, he said.
Possums had a major effect on biodiversity by eating vegetation and attacking chicks and birds' eggs.
Contractors were using cyanide bait (Feratox), and traps when there were houses nearby.
While the group was still negotiating for access with some landowners, the community had driven the project and volunteers would monitor the success of the programme, both in terms of possum and bird numbers.
The peninsula's layout made it well-suited to pest control, through strategically isolating areas once they had been cleared of possums.
Possums were skinned before being disposed of. Pelts were fetching up to $16.
Carcasses were disposed in an offal pit on a Taiaroa Head farm.
The work was relatively quick, in open country, Mr Wilson said.
The group planned to raise more funds to cover areas closer to the city, but it was difficult in a tight economy.
After possums, rats, ferrets and stoats would be the next pests targeted on the peninsula.
