They like acidic soil so use lime to sweeten the soil and make it hard for them to thrive. Repeated mowing or weed whacking in combo with lime is a safe bet if you want to avoid chems. Someone mentioned pulling horse tail. Never pull it , when you do you create two or more heads and make the problem worse. Cut them.

Google Keystone pest solutions in Idaho they have all the best ag chems in genetic form and you can read how to best apply them and in what combos .