Alexandra's annual Great Easter Bunny Hunt has been postponed so the newly released K5 rabbit virus has time to work.
The first batches of the virus were released in Central Otago this week at two sites monitored by Landcare Research.
Hunt convener Dave Ramsay, of the Alexandra Lions' Club, said because there were so many rabbits in the district, the organising committee decided it was necessary to support the introduction of the virus by not holding the hunt, which attracts hundreds of people from across the country.
"We made the decision to see this thing [the virus] work," Mr Ramsay said.
Otago Regional Council environmental monitoring and operations director Scott MacLean said 10 of the council's 100 doses were released on Monday night and the virus had since been released at sites in Central Otago and Coastal Otago.