Ian Epp is an agronomy specialist with the Canola Council of Canada

Approximately two weeks after spraying, scout to check for surviving weeds that may need a second application. These weed “escapes” have a number of potential causes – from sprayer misses to low water rates.

Another common cause is herbicide resistance. In the case of kochia, herbicide resistance is a safe assumption as many kochia populations have stacked resistance to multiple groups.

Approximately two weeks after spraying, scout to check for surviving weeds that may need a second application. These weed “escapes” have a number of potential causes – from sprayer misses to low water rates.

Another common cause is herbicide resistance. In the case of kochia, herbicide resistance is a safe assumption as many kochia populations have stacked resistance to multiple groups.