Intuitively, the addition of 1.0 lb. of nitrate applied 2-3 days before the scalping will help burn out the turf. The grass will elongate tremendously and probably require additional scalps. There are chemical alternatives to transition of fairways and roughs. Surflan will stop ryegrass in its tracks, turn the end of the leaf tips white and stop its growth. However, Surflan would limit bermudagrass stolons from pegging for about a month.
Image wipes out cool season grasses.
The half rate of 0.25 lb. Kerb has given me mixed results. MSMA at 2.0 lbs. For greens, I have found that repeated light verticutting is the best way to get rid of Poa trivialis, or ryegrass at transition. Other things equal, ryegrass has yielded more bermudagrass than Poa trivialis, under all management treatments.