I did a search already. I see that pramitol and sahara are great for total control along fences and so forth. However I have a customer who has a pine "grove" that is loaded with briars. Can I use a sterilant there or will it damage the pines as well? I could do the round up treatments except that this guy is the furthest customer from the shop and he is also the one I believe will be complaing if things arent perfect and I don't have the time or desire to be driving an hour every time he calls. Any advice?