The best way to control "nutgrass" is to get on your hands and knees with a cheap "sponge brush" and paint the leaves of the nutgrass with "Roundup"....I would recommend the "full strength" version and NOT the diluted cheaper version of the same
...this avoids any overspray but takes more time to apply. Patience is the key here........"full strength" here is the key for your labor.......Good luck as nutgrass is a very tough weed to defeat in both the lawn grasses as well as in the garden
>>>>>>>>>>Talon