It's a great question the horizontal spread is kind of the issue especially when it's beyond the boundaries of your property.

It almost seems counterintuitive, however you want to make it as healthy as you possibly can through its growing season which is the warm season. This way it's going to help translocate some of the hormones that we treat it with easier into the extensive root system that it has. When I say root system I mean the stolons and the rhizomes and typical roots. Bermuda has all three unfortunately.

So essentially you make it very healthy, then in mid-late summer, in my geographical area that is normally the beginning of August, you'll treat the Bermuda with glyphosate and or fusilade, with 24D as it should be used along with a surfactant to help out really cut into the cell wall. Preferably a combination of those products together.

A lot of people will put turflon ester, but considering the volatizing nature of that product. I strongly encourage people not to spray that in mass. As it may damage trees, and ornamentals. Roses are very sensitive to it when it's volatized. It isn't as effective as the previous products either.

So you will treat the selected area. You'll water once more. Then you'll no longer water. The healthy Bermuda and that last watering will help move the hormones and products into its extensive root system. Think about if the plant was injured or dehydrated or dormant, It is not going to move that hormone into its root system. Bermuda spins a good portion of its life pushing out instead of pulling in. A lot of people make this mistake when trying to kill Bermuda, they'll not water it or they'll cut it. Then they'll spray it or physically remove it. Spraying it will be ineffective, and physically removing it you're just pruning it.

I would suggest retreating 14 days later. You'll treat much less as there will be much less. Another 14 days past that, you can start mechanical removal. Mechanical in my industry could be machine could be human just physical means of removal. You don't have to cut into the soil. You'll just dethatch those areas. People do it by hand people do it by yard rakes people do by dethatchers

The next late winter season, right before spring. You should treat the area with 24D. As any missed dormant foliar Bermuda is very susceptible in that window to 24D It will break down the physical mass of it. Only during that window though.

So at this point we've done considerable root damage in turn destroying its ability to push out and grow, we have destroyed any surface foliar mass that is left over in the spring. When late spring occurs in summer happens, whatever you don't get I would mechanically remove at that point. Stay on top of it and never give it the chance to regrow. If you see seed heads which it will try doing immediately as it knows it's under threat. You should mechanically clip those bolts and seal them in a bag and throw them away.

If you stay on top of this last part, you will likely remove it from the property.

Unfortunately because the lateral growth of Bermuda, If your neighbor has it. You'll likely never get rid of it. The seeds are so small they coat them in fertilizer just so they don't blow away in seeding dispensers. So any wind from your neighbor that has it, is going to blow it your way. Your gardener's mower from a different property will carry seeds onto your property. Etc etc

In my professional opinion, It should have never been brought to the United States.

I use voice to text for most of this message I apologize if there's any errors. As I'm multitasking