A hatchery manual for the common, Chinese and Indian major carps. Other plants useful in eliminating unwanted fish from ponds are listed below. This list comes from Jhingran, 1975. Processing methods, dosage rates and application procedures are not given. Berberis aristata banalu Dioscorea spp.
Derris root is a good example.
Soak the root overnight in water, then pound it flat. Next, squeeze the root into a bucket of water until the water turns milky. Prevent any liquid from getting into the eyes as it may burn. Several factors influence the amount of poison necessary to kill fish and the length of time the poison remains active in the pond. The most important are water temperature, volume of water in the pond, and the amount of decaying organic matter in the water.