I'm looking for suggestions on controlling yellow primrose. I'm not trying to eradicate but it is getting out of hand really quickly and I need to slow it down significantly. I've done some mechanical removal but am not getting quite the cleanout I want.
I read through the TAMU and recognize some of the herbicides they recommend.... Here's the catch, I have water lilies that I DO NOT want to kill.
Obviously, I should avoid getting any chemicals directly on the lilies and watch my wind drift, but I'm not sure how close I can spray to them without worrying about spread through the water?
Any tips would be greatly appreciated.

Jeff-

1 acre pond, slopes to 15ft depth. Has BG and few LMB plus a half dozen pesky sliders.
[Linked Image from i108.photobucket.com]