Another weed/grass ID

Crabgrass. Looks like some bahiagrass or carpetgrass seed heads in there, too.

Crabgrass. ronk will know which kind. With a St Augustine lawn, no great post-emergent herbicide you can use without harming the St Augustine.

But being an annual weed, you can effectively control it with pre-emergent herbicides applied late winter/early spring (early to mid-Feb in south Louisiana). Seeds germinate when soil temp hit 55 F.

Prodiamine (cheaper) or Dimension (dithiopyr) would be the pre-emergents of choice. Dimension has some post-emergent control on very young crabgrass if you miss the window for early application of prodiamine in Feb.

If it pulls up easily and the little tendrils (correct word?) are soft, then it's smooth crabgrass. It's a fricking pain in the arse. I have celsius'ed it, pre-emerge'ed it. It's just a royal pain. It seems to stay in one spot which has been good but I can't eradicate it.

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TheWiz

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Yeah it appears to be smooth crabgrass as the leaves are not hairy.

I had 1 fairly large area of crabgrass, very thick, in the neutral ground several years ago, but I have centipede so I could knock it back with sethoxydim. But I started using Dimension pre-emerge in late winter about 3 years ago, and I easily had a 90% reduction In the crabgrass that year. 2nd year of use, for all practical purposes gone. Today I seriously have to look hard to find a few crabgrass plants in that same area.

You do have to apply the pre-emergent early though, by mid Feb in the BTR area, and this year the AgCenter recommended early Feb because of the unusually warm winter.

Great, I’ll get Dimension for next year then. Wife is gonna be super happy when I tell her I’m buying more lawn shite lol. Feels like it’s 1 step forward 2 steps back but I’ve seen some good results this year so I’ll keep trucking along.

Definitely need a cut just wanted to let it grow out so these guys could get a good look at it.

It's smooth crabgrass. Specticle is awesome but just make sure you use the St Aug rate. Also, do not do two apps of it. It won't kill it but it will set it back.