“We really need to step up engagement... involvement by heads of government directly, strategically and long-term with their counterparts.”

The producers are still calling for a reinstatement of the 'historic' exemption the Maritime provinces received from U.S. lumber duties.

After waging war on Canadian dairy, steel and aluminum, U.S. trade representatives are setting their sights on foreign berry farmers and vegetable growers.

Coniferous stumpage fees -- paid by forest companies for evergreen wood such as pine or spruce harvested from Crown land -- have nearly doubled to $67.31 in September.

Saskatchewan Premier Scott Moe said the issue of tariffs has come up during regular calls with other premiers.

The U.S. reimposing tariffs on some Canadian aluminum exports and Canada intends to put a reciprocal surtax on aluminum and aluminum-containing products from across the border.

Trump announced in Ohio on Thursday he intends to reimpose 10 per cent tariffs on aluminum imported from Canada.

Steve Verheul say that under the terms of the May 2019 agreement on tariffs, Canada would be able to impose retaliatory levies against American aluminum.

"They don't punish the intended target," an industry expert warned on potential aluminum tariffs.

Under the new regime, 60% of trade will come into the UK tariff free on WTO terms or through existing preferential access from January 2021, the government said.