Due to weed problems in cotton, it was reported this cotton was sprayed more than once with dicamba at higher rates than we use or are registered for use in the U.S. Some of these applications were in June – when weather patterns are more apt to cause off-target movement.
Next, the newer, less volatile dicamba formulations that are available to Ontario producers this year were not available to the American growers last year. It appears these farmers may not have paid enough attention to weather conditions at time of spraying or weather after spraying, resulting in off-target damage.

There will be lots of information this winter and in season as to how to correctly and effectively apply the newer dicamba formulations.
Bradley presented this research at the South West Ag Conference (SWAC), held Jan. 4 to 5 at the Ridgetown Campus of the University of Guelph.