A supervisor has been fined in the matter involving two Jamaican migrant workers who died on a farm in Ontario, Canada, 16 months ago.

According to the Canadian Press, charges were laid under Ontario's Occupational Health and Safety Act in the deaths of Paul Roach, 44, and Ralston White, 36, in September 2010 on Filsinger's Organic Foods and Orchards near Ayton.

THE STAR understands that charges were laid against Debra Ann Becker, Shaun Ronald Becker, Cory Richard Becker and Brandon Weber - the operators of the farm.

On Tuesday, charges against the Becker's were dropped and Weber pleaded guilty to a single charge and was fined $22,500.

It was reported that the Jamaicans were attempting to fix a pump for a vinegar vat when they were overcome by the fumes. They were removed from the vat with no vital signs, were revived and taken to hospital but died later.