jawbone - Two basic options here, hire someone to buy rotonone for you or hire the job to be done by a licensed applicator, or completely drain the pond dry. Pump out almost all the water and it will not cost much to kill off a puddle.
You may hear about adding chlorine to kill out the pond. A lot of fish hatcheries used to do that to kill their ponds. In fact it was recommended in Fish Hatchery Management by Dept of Interior. DO NOT DO THAT if you're are going to eat the fish.
The Chlorine free radicals in surface waters form trihalomethane complexes which include cholororm a suspected carcinogen. Trihalomethanes are stable in the environment and bioaccumulate which means they build up in fish. These chemicals are mutigens and carcinogens. Stick with rotonone or completely drain the pond down into a small sump area.
