Theo, I'm aware of an East Texas private 80 acre lake, Lake Echo, that has a horrendous milfoil problem. It is a private community of lake front property owners and has produced double digit bass. One of the owners, my Dentist, got some guys together, called and asked what to do. I said to call Lusk. They decided, instead, to try fertilizing a couple of coves. The Jury is still out.
A guy upstream has a chicken farm. I believe that the nutrient overload could have started the vegetation assault. They were going to try to do something about that to stop the problem. I explained that it wouldn't work. As the salad dies, it creates its own nutrient or fertilizer. They next asked what to do about that. I said call Lusk. The Jury is still out.