Lesser canary grass is a growing problem on Irish tillage farms. Canary grass is a growing problem on Irish tillage farms. Its small seeds allow the grass weed to spread easily. It is extremely competitive and while there is little information on it, its appearance in the field suggests a significant effect on yield, aside from difficulty at harvesting. Lesser canary grass is turning into a serious problem in some areas, particularly where spring barley is common and continuous. At present there is no known evidence of resistance to herbicides in lesser canary grass. The strong-stemmed grass is extremely difficult to control without a herbicide