I have a large, mature maple tree in my yard that I want to kill. There are surface roots. I would like to do it by either a soil treatment, or some other chemical that will destroy the roots. I am at my wits end. I have done a lot of research on caustic chemicals (ie blended sulphuric acid, copper sulfate pentahydrate, and lye), but have not found anything that will confirm which one will kill the tree the fastest. Herbicides I have come across for this include Bromacil, Hexazinone, tebuthiuron, and Metsulfuron. At this point, I am tempted to just pour battery acid on the roots and the tree trunk. Can someone please help me? :help: