Under the terms of the Food and Drugs Act of Canada, an Act enforced by the Food and Drug Directorate of the Department of National Health and Welfare, “No person shall sell a food which has in or upon it any poisonous or harmful substance.” A pesticide, because of its purpose, is toxic to some form of life, whether it be an insect, a fungus, a rodent, or a plant. Hence, if a pesticide either directly or indirectly becomes part of a food which may be consumed, a complete and thorough assessment must be made to ensure that the amount remaining on the food is not harmful to man.