Season-long weed control in soybean crop production begins with the use of a soil herbicide applied pre-emergence (PRE). The most consistent control of weeds is achieved when weeds are germinating and most vulnerable, making a PRE most effective. The most inconsistent control of weeds is achieved with post-emergence (POST) applications of herbicides. However, regardless of the application timing, herbicides with effective sites of action are required to control the weeds that may be in soybean producers’ fields and reduce the selection pressure for resistant weed biotypes. One needs to understand the history of weed control in Illinois to prevent [...]