Pat, I'd say yes, but a huge, "It Depends". Tilapia prefer FA first, then aerobic bacteria on muck/detritus, and then other foods not being competed for in each pond setting.
How many pounds stocked it would take to get the Ludwigia eaten is an unknown.
I'm sure you already know if you have the stuff...it is a federal noxious weed and spreads via fragmentation....
