Clover fescue is a tall grass, growing to over 48 inches when left undisturbed. It is a cool-season grass that is used primarily to feed livestock. With a bit of effort, it's possible to control the grass with a pre-emergent weed control product. This prevents a re-infestation the following spring, eliminating the seed production of any clover fescue left behind.
Mow the grass, using the shortest blade setting on the mower. Weed-eat grass that is too tall to be mowed, then follow with a short mowing.
Rototill the infested areas with a rotary tiller. The rotary tiller will remove the grass and root system. Rake the detached grass and debris from the lawn, placing it in plastic bags. Do not attempt to use the removed dead grass as organic material in gardening areas. This will only spread the seed of the clover fescue.
Fill a broadcast sprayer with a mixture of a pre-emergent weed control product and water. Pour 2 qts. of pre-emergent weed killer containing triclopyr into the sprayer, followed by 1 gallon of water. This combination will treat 1000 square feet. Apply the weed killer to the entire infested area. Re-fill the sprayer and repeat as necessary to treat the entire infected area.
Allow the remaining clover fescue to die, raking it from the lawn. Discard any remains to prevent the spread of seeds. Apply grass seed the following spring to the area.