Tasmanian beekeepers are threatening a pollination ban if the island state's GM-free status is rescinded.

Tasmanian beekeepers say they will refuse to pollinate certain vegetables if the moratorium on genetically modified crops is lifted in Tasmania, which would lead to millions of dollars in lost revenue.

Tasmania is currently GM-free, but the state government is conducting a review of the ban.

President of the Tasmanian Beekeepers Association Lindsay Bourke says the Tasmanian honey industry depends on non-GMO status for access to European and Asian markets.

"One of the vegetable crops that we pollinate will be devastated, because we won't go anywhere near it," he said.

"We won't go and pollinate if there is a GMO crop alongside that.

"We will go and produce honey."

Mr Bourke won't specify which vegetable crops may not be pollinated.

But the peak body for dairy farmers in Tasmania says that if the moratorium is not lifted, dairy production in the state will be at a commercial disadvantage.

One of the vegetable crops that we pollinate will be devastated, because we won't go anywhere near it President of the Tasmanian Beekeepers Association, Lyndsay Bourke

Executive officer of Dairy Tas, Mark Smith, says while Victoria does not have a ban on GMO, pastoralists have access to grasses with higher yields and lower inputs.

He says the debate over whether or not the ban should be lifted, should be based on science.

"The assessment will need to be done by people who can have a good clear objective look at it.

"They need to have a good clear look at the situation, so that we're not driven by fear, misinformation and assumption," he said.