One of the most marginal seats in Australia, which sits in a battleground state, is poised to again go down to the wire at the upcoming federal election.
Forestry industry-funded polling of 712 residents in the mostly rural Tasmanian electorate of Lyons has Labor ahead 50.94 per cent to the Liberals' 49.06 on a two-party preferred basis.
Former state leader Rebecca White is running for Labor, after replacing incumbent colleague Brian Mitchell, against Liberal Susie Bower.
Lyons is currently held by Labor with a margin of less than one per cent as national polling points to a tight race between the major parties to form government after the May 3 election.
Opposition Leader Peter Dutton campaigned in the seat on Sunday, cementing its importance in the federal contest.
The Liberals have raised questions about Labor's Lyons pre-selection process, given Mr Mitchell supported Ms White taking his spot but contested a party vote and subsequently received a payout.
Mr Mitchell said he still nominated because he was happy to allow the party to decide.
The Lyons polling, conducted by UComms for the Australian Forest Products Association in early April, also showed strong voter support for the native forestry industry.
Both major parties support the industry in Tasmania, but Labor was left red-faced when Bass candidate Jess Teesdale recently said she wanted to see native logging ended.
She quickly walked back the comment but it was seized upon by her Liberal opponent, Bridget Archer, who called on Ms Teesdale to stand up and let her real views be known.
Three Tasmanian seats - Lyons, Bass and Braddon - are all considered to be in play.
Braddon in the northwest is held by the Liberals with an eight per cent margin, but incumbent MP Gavin Pearce is not re-contesting.
Former senator Anne Urquhart is Labor's candidate, while engineer Mal Hingston is running for the Liberals.
The seat includes Macquarie Harbour, which has been at the centre of a political storm over the future of salmon farming and its threat to an endangered fish.
Legislation to safeguard the industry in the harbour passed federal parliament with the support of both major parties just before the election was called.
Salmon farming is also an issue in Franklin, held by Labor's Julie Collins with a 13.7 per cent margin.
More than 6300 tonnes of salmon were dumped in February during a mass mortality event, with further protests against the industry's presence in Tasmania planned in April.
