If you use Hyvar, you might regret it. My tree business gets a calls every year from people that have used this stuff. It leaches under ground and will travel. People spray their fence row and end up killing their trees that may be located as far as 100 feet away. Good ol brush killer mixed with some diesel or Dawn will usually do the trick. I leave the soil sterilizer to oil field pads where it is used quite a bit.
Does this Brusk Killer have a name?