Agronomy Library > Manure & Application

Finally – Some New Herbicide Options
Author: Eric Johnson - AAFC - Scott et al
Date Created: November 21, 2007
Last Reviewed: November 21, 2007
The past decade has seen very few new herbicides or new modes of action introduced into Western Canada. This is due to a number of reasons including a depressed agricultural economy and the introduction of herbicide tolerant crops (Roundup Ready, Liberty Link, and Clearfield) made it difficult for companies to introduce new chemistries that could compete with the broad spectrum weed control and price that those herbicide systems offer. There are changes on the horizon due to economic and other factors. Generally, the economics of growing field crops is improving in North America. Also, the number of herbicide resistant weeds continues to increase, including glyphosate resistant weeds. Currently, there are twelve confirmed species of glyphosate resistant weeds world-wide, with a number of them present in the United States. Continued glyphosate use in cotton, corn, and soybeans is the primary reason for the increased incidence of weeds resistant to this mode of action. Another factor has been the Pesticide Minor Use Program. The program has allowed us to screen Group 14 herbicides, a mode of action that was not present in Western Canada but were available in the United States. The screening and research has paid off, with one product already registered (carfentrazone or Clean Start) and another product to be registered soon (sulfentrazone).  open the attached PDF for the complete paper