I don't think so, I will not be putting it down in a huge amount. Mixing seems to be 1.5-2oz per gallon of water. I will only need 2 oz for a gallon mix I think, but that's the way it comes $75 for 1 gallon, but I read it's the best. My neighbors have the same stuff to clear out so we may split the cost.
To kill a tree, I would have to spray it up on the leaves, it's supposed to be water resistant after 2 hrs, so it shouldn't wash off into soil.