When we moved into our place, we had them things - mine pulled out of the ground easy, root and all. I just took a wheelbarrow and pulled them one x one, one load after the other. Sure, it took a bit, but they never came back.
They are gonna be with you for a while. No need for me to repeat what the guys have said ... Except to say you will wind up using ALL the suggestions here for multiple years before you are rid of the bastards. God I hate stickers. Welcome to Oklahoma!! 
The issue with using MSMA is that it kills everything but bermuda grass, so if you have shaded areas with fescu, you don't want to use MSMA.
It's going to take awhile to get rid of them because the seeds from previous years will still be active and produce new plants.
Several things one can do. You can treat the lawn with pre-emergent that stops the seeds/burrs from growing, or you can spot spray the plants for what will be a couple of years.
Sand burrs thrive on sandy soils with poor lawns that need fertilized for some reason. Easy to spot when you recognize them.
When I'm running around on the mower in our yard which is sandy and prone to having sand burrs, I keep a spray bottle of Roundup on the mower to hit the individual plants.
Yeah, there were white dots of dead grass all over the place, but in a couple of years, no sand burrs.
Tough to get rid of completely where we live which is way out in the sticks, as animals moving through bring the seeds, but we have them under control.
It's going to take awhile to get rid of them because the seeds from previous years will still be active and produce new plants.
Several things one can do. You can treat the lawn with pre-emergent that stops the seeds/burrs from growing, or you can spot spray the plants for what will be a couple of years.
Sand burrs thrive on sandy soils with poor lawns that need fertilized for some reason. Easy to spot when you recognize them.
When I'm running around on the mower in our yard which is sandy and prone to having sand burrs, I keep a spray bottle of Roundup on the mower to hit the individual plants.
Yeah, there were white dots of dead grass all over the place, but in a couple of years, no sand burrs.
Tough to get rid of completely where we live which is way out in the sticks, as animals moving through bring the seeds, but we have them under control.
Neighbor has hay crop. He recommended Bayer Pastora.
I spray mid May. Then again July weather permitting.
This is post emergent. I believe sand burrs germinate all summer with monthly rain. It sure perks them up even when the bermuda is slow.
Stay outside tree drip line.
Residual wash in soil and overspray will kill trees. I cover my small stuff with garbage cans.
Good read.
extension.okstate.edu
I get it here.
I spray mid May. Then again July weather permitting.
This is post emergent. I believe sand burrs germinate all summer with monthly rain. It sure perks them up even when the bermuda is slow.
Stay outside tree drip line.
Residual wash in soil and overspray will kill trees. I cover my small stuff with garbage cans.
Good read.
Sandbur Control in Bermudagrass Pasture - Oklahoma State University
Learn how to identify, control and prevent the highly invasive bermudagrass pest, sandburs.
extension.okstate.edu
I get it here.
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We have a brick patio that I built. Weeds, and grass, come up between the bricks, and i have tried roundup, and several other herbicides. These worked ok for a few weeks, but then the grass, weeds were right back. Having worked around the oil business, I noticed were salt water was dumped on the ground decades ago, there is still nothing growing! So being the genius I am, I got a bag of rock salt, spread it all over this patio, swept it into the cracks, and wet this down! It worked better than the roundup, this stuff did come back the next spring, but kept this grass out for the whole summer!!
MSMA is your friend.
Crawford, Oklahoma? I know the preacher at the church there. He is even a member here on osa.
If you really want to get rid of them do nothing to them this year, next spring early work up your yard, and in May or June I promise you won’t have a single sand burr.
Honestly try out a product called Pastora, it’ll kill the sand burrs and Johnston grass if you have any and it won’t hurt your Bermuda grass
Honestly try out a product called Pastora, it’ll kill the sand burrs and Johnston grass if you have any and it won’t hurt your Bermuda grass
I had a solid patch of burrs about 3 acres. Ran a disc over 3-4 times and bought a 16' trailer load bermuda sprigs and put the boys to work. Set the discs straight (not cutting) and disc in the sprigs. Unable to water but did get yearly soil analysis from OSU. Applied exact recommendations and rates. Darn stuffs too expensive to guess at. After 5-6 years able to walk across barefoot.
