Can I spray momentum on fescue and Bermuda grass to kill weeds?

Yes, you can use Momentum (a herbicide containing the active ingredient isoxaflutole) on both fescue and Bermuda grass to control certain weeds. However, it's essential to check the product label for specific guidelines on application rates and timing, as well as to ensure that the grass types you are treating are tolerant to the herbicide. Always follow local regulations and guidelines for herbicide use to minimize any potential harm to desirable plants and the environment.