A post-harvest weed control strategy targets perennial and winter annual weeds to prevent them from stealing early season moisture the following spring. Use the information in the following searchable guide to easily select herbicide options for post-harvest weed control. You can search by main target weed or by herbicide group. The information in this digital guide is compiled from 2020 provincial crop protection guides and herbicide manufacturers. Follow the information in the guide and on product labels if there are any discrepancies with the information in these tables.