All Crabgrass?

[PSU4ME]

Helping out a neighbor who seems to have a bunch of crabgrass around, some of which is responding to treatment. I’ve down a blanket of WBG and spot treated with Quinclorac and MSO. I know mature CG is hard to kill but I’m wanting to see if you all agree that both of these pics are CG.

[turf_toes]

Most folks are notoriously bad at identifying grassy weeds from pics. That said, crabgrass will die off itself in a few months. It’s an annual weed.

I suggest looking closer at the whole plant. Does it have underground rhizomes? Take a closer look at the above ground plant.

No one is going to have a better look at the features of that plant than you.

[Green]

The photos are tough to evaluate, but something doesn't look right to me. My gut feeling and advice: see if you can rule out Dallisgrass/Field Paspalum/Bull Paspalum. These species have the V-shaped seedhead, and grow in tight upright bunches or flat mats, depending on the species. The don't root at nodes like crabgrass. A long-term neglected or minimal maintenance lawn is more likely to have these. They are fairly common in MA. I have seen them in person here, too. They are more challenging to get rid of than crabgrass if that is what you have mixed in..they're Perennial warm-season species.

[PSU4ME]

I went over and pulled some of them up, they are thin roots vs rhizomes. Used some round up on other plants I know where not crabgrass. He just had his septic tank replaced and I nuked the whole area there as it was growing some nasty stuff. Will lay seed in 2-3 weeks