Mr. Mucci,
The fairways were gassed with MB in 2005 with the highest allowable rate. I cannot recall what that is, but I've seen the renovation/construction plans. I've also been lead to believe that the fairways were roto tilled about 4" deep and smoothed back out. Unfortunately, when a less aggressive grass in introduced into an area surrounded by a much more aggressive grass, you will inevitable have contamination, especially where common was once the main turf. I guess it would be similar to bentgrass in the south, surrounded by bermudagrass. Aerification, verticutting and divots with eventually introduce an unwanted turfgrass.
With the use of Celebration, the toxicity of MB and the aggressive nature of the new turf, most courses are staying the course with Roundup/Fusilade applications. Cost is also a factor. Our costs for our spray outs are about $100/acre. The use of MB can be over $10k/acre, along with the fact that it’s being phased out, hard to come by and an outside contractor must apply it. There are many things that can go wrong if an MB application were to go wrong.