Workers at the six main grain terminals located in the Canadian port of Vancouver went on strike on Tuesday, a move that could disrupt exports of canola and other crops, government and industry officials said.

Grain workers at Canada’s biggest port went on strike Tuesday over a dispute regarding hours and pay, setting up what an industry association called a “devastating” situation for farmers during the harvest season.

The walkout on Canada’s west coast is the latest in a string of labor actions to hit the country’s supply chains.