Nature and occurrence of herbicide-resistant wild oat and green foxtail across Saskatchewan ecoregions
A survey conducted in 1996 indicated that one in nine fields has Group 1-resistant (R) wild oat and one in twenty fields has Group 1 -R green foxtail in Saskatchewan. However in the Parkland region, one in six fields has R wild oat and one in eleven fields has R green foxtail. One in five Group 1-R wild oat populations exhibits Group-2 resistance; these multiple-R populations greatly restrict chemical control options for producers. Results from this survey should alert producers to be more proactive in preventing, delaying or managing R weeds, by practicing herbicide-group rotation and integrated weed management.
Soils and Crops Workshop