Chiquita's decision to stop using oil from Canada's tar sands has prompted EthicalOil.org to release a radio advertisement encouraging listeners to boycott Chiquita bananas.
The advocacy group for Canadian tar sands has also set up a website, ChiquitaConflict.com, for the same purpose.
Last week, Chiquita agreed to stop using oil from Canada's tar sands to move its bananas from Latin America to the US.
In response, Jason Kenney, a minister in the Canadian government, tweeted over the weekend: "I gather that Chiquita Bananas has no problem with Iranian oil, but is boycotting Canadian oil. No more Chiquita bananas for me."
The fruit giant was the target of a media campaign to stop using tar sands oil by US-based environmental group ForestEthics, but since committing to desist it has attracted the ire of Canadian organisations including the Alberta Enterprise Group, which called its decision "misguided greenwashing".