The latest Nielsen opinion poll shows federal Labor’s support hitting a 15-year low as it tries to head off a business revolt over the carbon tax.

Today’s poll in the Fairfax press shows Labor’s primary support slumping two points to 31 per cent, its lowest point since the aftermath of the Keating government’s defeat in May 1996.

The poll also says almost two-thirds of Australian voters are opposed to the Government’s proposed carbon tax.

It says opposition to the tax has risen three points to 59 per cent, whereas support remains unchanged at 34 per cent.

Meanwhile the Food and Grocery Council has joined the steel industry and other manufacturers speaking out against the tax.

The council is one of 45 business groups to sign a letter to Prime Minister Julia Gillard asking for assurances they will not be disadvantaged under the tax.

Council CEO Kate Carnell says there is no doubt that goods manufactured in Australia will cost more under a carbon price.

“If imports are cheaper than the Australian manufactured goods, our experience is that Australians will buy imports and that’s why giving Australian taxpayers some money to compensate them for the carbon tax doesn’t help us at all,’ she told AM.

“It just means they’ve got more money potentially to buy cheaper imported goods. It doesn’t mean that they’ll pay the extra for Australian-manufactured goods.”

Today’s poll shows Coalition’s primary vote increasing, rising two points to 47 per cent.

The Coalition now leads Labor 56 points to 44 on a two-party preferred basis.

In more bad news for Ms Gillard, the poll shows a majority of voters want her predecessor Kevin Rudd back in The Lodge.

Mr Rudd, who was ousted by Ms Gillard after climbing down over his emissions trading scheme, leads her by 55 points to 38 in the preferred prime minister standings.

Malcolm Turnbull leads Tony Abbott by 41 per cent to 28 per cent as preferred Opposition leader.

ABC Online HERE