This is the prime problem with trying to grow buffalo grass as a turf. When you mow and fertilize, it is inevitable that it will be invaded with bermuda. Buffalo grass, and especially 609, is a beautiful grass when allowed to grow like the prairie grass that it is. That is, no water, fertilizer, or mowing. This unkempt look is not acceptable in most residential neighborhoods so folks should consider other grasses. What can you do with what you have? Quit mowing and fertilizing. Allow the bermuda to grow into long runners and, using a sponge and rubber gloves, apply a glyphosate herbicide (nonselective) to the bermuda runners, getting as little as possible on the buffalo. This is tedious, but there is no other way except to spray the bermuda with the herbicide, killing both the bermuda and the buffalo. It is imperative that you not allow the bermuda to go to seed.

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