Weed Problems. Pigweed species was the worst weed problem in KS, but foxtail was the worst weed problem in MN, ND and SD. Other common weed problems included Russian thistle in KS, Canada thistle in MN and ND, and wild mustard in MN and ND (Table 28).

Pigweed species was the worst weed problem on 26% of KS respondents' acres, followed by Russian thistle on 24% and kochia on 18%. Kochia was one of the three worst weeds by 64% of KS respondents' acres, followed by pigweed species on 47%, Russian thistle on 38% and foxtail on 35% (Table 28).

Foxtail was the worst weed problem on 35% of MN respondents' acres, followed by Canada thistle on 19% and wild mustard on 18%. Foxtail was one of the three worst weeds on 59% of MN respondents' acres, followed by wild mustard on 51%, Canada thistle on 39%, quackgrass on 29% and wild oat on 27% (Table 28).

Foxtail was the worst weed problem on 29% of ND respondents' acres, followed by wild mustard and Canada thistle, each on 19%. Foxtail was one of the three worst weeds on 58% of ND respondents' acres, followed by wild mustard on 51%, Canada thistle on 50% and kochia on 28% (Table 28).

Foxtail was the worst weed problem on 58% of SD respondents' acres. It was one of the three worst weeds on 69% of SD respondents' acres, followed by Canada thistle on 47%, kochia on 45% and pigweed species on 23% (Table 28).