I am not in the spraying business and don't plan on being anytime soon but, a customer of mine called today asked me what she should use to kill goat head stickers with. She was wondering if there was anything she could use that would kill the stickers and not her buffalo grass? Just to let you know the temps are still in the 90's here during the day. I told her I would ask someone that had more knowledge than me and get back to her. Any help or sugesstions would be greatly appreciated.