I use Glyphospate under trees. You get it on the leaves of what you want to kill. Unlike 24d is's not soil active. If you accidentally got some on lower branch leaves you might loose the branch, but that would be about it. That's one reason you can buy it here in TX. in 2 1/2 gallon containers without an applicator's permit whereas soil active herbs. like 24d is restricted over the quart size.