Methods of increasing the tolerance of a plant to an herbicide and seeds for carrying out these methods are provided herein. The methods include treating the seeds of the plant with an insecticide prior to planting. The insecticide treatment makes the resulting plant more resistant to herbicides and in particular to post-emergence herbicides as compared to untreated seeds. The plants suitably do not have complete natural or complete engineered resistance to the herbicide. The treated seeds are then planted in a field and the herbicide is applied to the field. The resulting plants growing from the treated seeds have increased tolerance to the herbicide as compared to plants grown from seeds not treated with the insecticide
