Lawn & Turf Tips:  Barnyard Grass

Barnyard Grass

Description  

Usually found in poorly managed lawns of low fertility.  It reproduces from seeds and develops into a plant with a shallow root system.  Usually upright but forms ground-hugging mats with mowing.

Cultural Control

Chemical Control

Kill mats of actively growing barnyard grass with a chemical containing methanearsonate or fluazifopbutyl.  Repeat the treatment 2 or more times, at intervals of 7-10 days, until the plants die.  The chemical may discolor the turf for 2-3 weeks.  To kill barnyard grass seedlings as the sprout, apply a weed killer containing DCPA in the early spring, 2 weeks before the last expected frost.