Question
Hi there, would you be able to tell me if couch/bermuda grass has a negative effort/killing kikuyu grass?

Answer
Belinda:

I am not personally familiar with Kikuyu grass.  Therefore, I can not tell you which would win in a competition between kikuyu, Bermuda and couch grass.  Since it was considered a weed, I would assume that it is aggressive, like most summer grasses.  If someone knew, they would have to also know where you live to make an educated guess and know what your preference is.

Best wishes.