Can they spray for EWM and/or zebra mussels?
It is impractical for a lake the size of Shell Lake. The annual cost would be on the order of $1M, and the ecological consequences totally unacceptable. Even if it could be done, it would turn the lake into a freshwater-based desert. The only acceptable alternative is to subsurface harvest the EWM beds. This is an expensive ongoing operation that would cost approximately $200K per year.