15 Canadian farm organisations have signed a letter opposed to genetically modified alfalfa.
They're asking the federal agriculture minister to remove variety registration for all GM alfalfa until a full economic impact assessment is conducted .
They also want testing of all imports of alfalfa seed grown in the U-S.
The president of the Union of Agricultural Producers in Quebec says those moves are imperative to prevent irreversible contamination.
NFU Board Member Peter Eggers warns many farmer livelihoods will be threatened by the proliferation of this one GM crop.
Heather Kerschbaumer of Forage Seed Canada says the risks and costs are just too high for the industry.
And Lisa Mumm of the Canada Organic Trade Association worries Canada's growing and high-value organic sector could be seriously harmed by GM alfalfa.
According to the 15 groups involved, Forage Genetics International has announced it has sold a limited quantity of GM alfalfa seeds for spring 2016 planting in Eastern Canada.
The GM traits are for glyphosate-tolerance and low-lignin.
