What grass will 2 4 D hurt or kill?

2,4-D is a selective herbicide primarily used to control broadleaf weeds, but it can also harm or kill certain grasses. Sensitive grass species, such as Kentucky bluegrass, fescue, and certain types of ryegrass, may experience damage or die when exposed to 2,4-D, particularly if applied at high rates or during stress conditions. It's essential to follow label instructions and use caution when applying near desirable grasses to avoid unintended harm.