Answer: Tenacity can only be used on bermudagrass that is still dormant when trying to remove weeds or target grasses from it. If the bermuda is only semi dormant you will see whitening and damage to the bermuda. There are a few other potential options for you to remove the bentgrass from your bermuda lawn, though.

How do you kill Bermuda grass with tenacity?

You typically need to apply Tenacity at least a second time around 3 weeks later for it to actually kill the weed. For really hardy weeds you may need to apply a third or even fourth time to kill it, but beware it may also impact the nearby Bermuda grass and bleach it white if you are putting down that much.

What grass is tenacity safe on?

Tenacity is safe for use at or prior to seeding on Kentucky bluegrass, tall fescue, perennial ryegrass, and centipedegrass. Application at seeding can be made to fine fescue only if it is less than 20% of a seed mixture.