Little barley is commonly found in disturbed areas such as roadsides, overgrazed pastures and sparse lawns. The best control against this weed is maintaining a thick lawn and mowing it high so the sunlight doesn’t reach the soil. For sparse lawns, overseeding in late August to early September can help, but little barley that germinates early may still appear. A preemergent herbicide can be used to prevent the little barley from sprouting if you do not plan to overseed.
Dimension (dithiopyr), is labeled for barley (Herodium spp.) which includes little barley. Apply the preemergent herbicide in mid-September and water in to activate. In southern Kansas you may have to apply a couple weeks earlier. (Cynthia Domenghini)