Actually, I was refering to a private landowner who treats his own pond. Currently, a license isn't required in most states for the private application of "general-use" herbicides, such as fluridone. Of course, that may change if/when the new NPDES regs kick in this fall.
Also, if someone succeeds at stocking enough ducks and GC to clean up a heavy naiad infestion on their own, how are these biological control-measures convinced to eventually curb their appetite - so as not to denude the pond?
