As I've mentioned on a couple blog posts, we are in the midst of a couple herbicide applications that selectively remove Creeping Bentgrass from Kentucky Bluegrass. This is something we apply annually and have done so for a number of years. You can see on holes like #1 and #2, where the Bentgrass is turning white, which is normal for it, after the herbicide is applied. You can see above that some Bentgrasses are more affected by it than others. Bentgrass is the lime green grass in the photos shown here. There is no such thing as a pesticide that eradicates 100% of a given pest. When I say pest, I refer to not only insects, but weeds and fungi as well. A good pesticide would typically offer up to 90% control of a given pest. So in this case, eradicating all of the Bentgrass isn't realistic. But if we can kill 50%-80% of it, it is still a victory that allows our Kentucky Bluegrass roughs to look good a few years longer compared to doing nothing.
