Doesn't look like the kind of crabgrass that is common around here. But if you want to try something, Bayer, IMO, makes the best crabgrass killer that is safe on your lawn. It also kills some other types of weeds that traditional weed killer won't take care of because those weeds mimic grasses too closely... Foxtail, Sandbur, Japanese Stiltgrass, and a few others.
