A few years ago I solarized a bank along my property that was a hazzard to mow. I planted white pineberries which did a great job of being a geound cover. However last year some crown vetch made its way in. At first it was barly noticable, but now its chocking out everything in its path. Is there any easy or feasible way to remove it? Im assuming ill have to use herbicide but there are several other plants of interest nearby that I do not want to kill. Any advice on removal???