Grass ID is challenging, especially from photos, due to the need to use multiple fine structural details to separate similar species. Our best guess, based on the traits we can see, is that this is Dallisgrass, but we can't be certain. You can use the information on the linked pages to evaluate traits like ligule, vernation, root structure, etc., to see which common weedy grass species is a good match. The documents below include explanations and illustrations of what those terms are referring to.

• Turfgrass Weed Identification -- Ohio State
• Cool-season Turfgrass Identification -- Penn State (for additional illustrations for the terms)
• Weed Identification: Dallisgrass -- VA Tech

We do not list specific herbicide products for certain weeds, but you can look for any active ingredients included in the management tips for the weed in question and follow product label instructions for use. In cases like this, herbicides for Crabgrass also often affect Dallisgrass. Most perennial grassy weeds growing in a turfgrass lawn have few herbicide options that aren't broad-spectrum (which will kill the turf as well), so if the weeds are scattered and not too numerous, it may be more effective to dig out the clumps rather than spot-spray them.

Miri