Hello

Identifying grasses requires close examination of tiny details, usually under magnification. You may send whole plant samples, including the roots attached, to MSU Plant and Pest Diagnostics lab for identification. Include pictures of the whole plant and of the lawn containing the unknown grass.

If you still have the seeds that were in the feeder, it may help to send a small sample of them, too. If the bird seed package lists what seeds are contained in the mix, that would be helpful to the lab, too.

See the web site for fee schedule and instructions-

https://www.canr.msu.edu/pestid/

Once the type of grass is known, there may be a way to kill it with herbicide that doesn’t affect KBG, but the quickest way to remove it is by hand, or to use a nonselective herbicide, such as glyphosate, on the section of grass and then reseed or resod.