Bermudagrass is difficult to control (esp. in other warm season grasses) and usually requires several applications of herbicides to control.  If you have just a small amount of bermudagrass in your zoysia, it may be easier to just hand-pull the bermudagrass.  Or it may be worthwhile to have a licensed technician apply an herbicide.

Here is some information on controlling bermudagrass in zoysia.  There are a couple of name-brand herbicides that are mentioned.  Mixing instructions are on the herbicide label.  It is important to read and follow label instructions when using any herbicide.  According to several sources, Fusilade is not labeled for use on home lawns.

B 1393_1.PDF (uga.edu)

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