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bayoubengals88
Wisconsin Fan
LA
Member since Sep 2007
12167 posts

What could this weed be? (I'll add a pic later if needed)
My bermuda and St. Augustine yard hasn't grown much AT ALL since last Friday's cut.

HOWEVER, I've got a reoccurring patch of tall, thin, dark green (grass/weeds) that grows straight up. The stuff is fairly stiff.

Any idea of what this could be? It tends to shoot up 3-4 inches out of nowhere.


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
990 posts

bayoubengals88
Wisconsin Fan
LA
Member since Sep 2007
12167 posts

re: What could this weed be? (I'll add a pic later if needed)
quote:

Like this? Poa annua. Photo would help.

Yeah I believe that is it. I'll do a little research and listen to what you might want to say about it.


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
990 posts

re: What could this weed be? (I'll add a pic later if needed)
If it’s Poa (annual bluegrass) using pre-emergent herbicides in mid-Sept/mid-Oct is the key to successful control. Poa was a major winter lawn weed for me 3 years ago, no longer since I’ve used pre-emergent herbicide.

You’re past that window of application now. If you have a St Aug or Centipede lawn (not Bermudagrass) you can kill it with the post-emergement herbicide Atrazine (add surfactant/spreader-sticker to the herbicide solution) and I’d recommend you spray it soon before it develops a seedhead. Atrazine is inexpensive and pretty much available everywhere - plant nurseries, hardware stores, and big box stores Give it some time to work, it’s a systemic herbicide and it may be a few weeks before you see the results in cooler weather.

Here is a good article on Poa and control options from Clemson U.

LINK


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