Even with the best methods available, the best kill you are going to receive is 96% without fumigation. Check out the link for more info:
http://www.pikecreekturf.com/renovation.htmlThat being said, we are in the process of performing a "no-till" regrass on our driving range tee to see what new varieties we can switch to in the future. Our process consisted of:
Day 1:Spray the surface with Glyphosate @ 2oz/gal along with Fusilade II at 32oz/ac and an ammonium sulfate spreader sticker.
Day 6: Apply ammonium sulfate at 1#N/m.
Day 15: Spray the surface with Glyphosate @ 2oz/gal along with Fusilade II at 32oz/ac and an ammonium sulfate spreader sticker.
Day 21: Apply ammonium sulfate at 1#N/m.
Day 29: spray the surface with Glyphosate @ 2oz/gal along with Fusilade II at 32oz/ac and an ammonium sulfate spreader sticker.
Day 37: Sprig with new turf. (In our case, we also aerified and verticut aggressively prior to sprigging).
The AmSulf was to encourage regrowth in between sprays. We also maintained our normal irrigation scheduling the entire time to encourage optimum regrowth of the Bermuda. We hand sprayed with a gun since it was a small area and we wanted good coverage and a high enough pressure to penetrate the canopy and still found areas that didn't quite die from the first app. The second app I would say got almost all of it as we didn't see any green the day before the third app. The third app was for good measure.
It's the not the fastest method. If fast and complete control is what you want, I'd excavate 48" and fill with sterile soil. That's the only way you can ensure 100% removal of the existing turf.