It was introduced into North America and now occurs throughout all Canadian provinces, as well as in the MacKenzie District, Northwest Territories. In Ontario, wild mustard is common in cultivated fields, gardens, pastures, riverbanks, roadsides, and waste places. Heavy infestation of wild mustard on recently disturbed soil.
Wild mustard can represent a serious weed problem in canola and spring cereals.
Germination of wild mustard seed, and rapid early seedling growth under cool spring and fall temperatures allow wild mustard to compete effectively with crop plants for light, water, and nutrients. Populations of wild mustard left uncontrolled throughout the growing season can reduce potential yield and seed quality of the harvested crop. Description Wild mustard is an annual plant that exhibits erect growth. Wild mustard seedling. Notice broad kidney-shaped cotyledons indented at tip.