Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants NEED HELP IN OREGON

HELP !! I believe I have a problem with Hydrilla or a Coontail.
I would like to kill off part of it and then control it. It does make for good cover for the minnows but it is expanding. It some parts of the pond it is submerged and in a couple shallower areas it is slightly emerged with a very small whitish flower.