Choke it out by sowing millet, soybeans or cowpeas, making sure that the land first is thoroughly cultivated and the weather is hot and dry. Two successive crops of rye also will choke it out. Dry weather will wilt the roots of quack grass if they are brought to the surface.
Hand pulling is recommended if there are but a few plants.
Like so many other thinks quack grass isn't all bad. It is good cattle feed, and because of its persistence it makes a good covering for gullies and road banks where live soil has been cut open and few other plants will grow. Though hard to get rid of once it is started, it does prepare the soil for better things. Oddly, it is wheat's nearest relative.