When on a maintenance bid yesterday and the guy was showing me around. He want some one to mow and keep the lawn up. He showed me a long line of ditches along one side of the property. He said he'd like for us to mow as far down as we could, trim the rest, and spray a 2-3 foot wide steak at the bottom to kill everything. It's been cold and we had some recent rain, so there was some water in the bottom. From a legal and environmental standpoint this is something I will not do since I'm sure this runs to a blue line stream at some point. Is there a product labels for this purpose? I don't have the aquatic add on. I'm not sure if the license requirement would be different if the ditch was dry(summer) and no chance of rain.