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Derris eliptica is a species of leguminous plant from Southeast Asia and the southwest Pacific islands, including New Guinea. Also known as derris powder and tuba root (in Indonesia), it was formerly used as an organic insecticide used to control pests on crops such as peas. However, due to the high acute toxicity of rotenone to which the powder is often refined, it is unsafe: in spite of its popularity with organic growers., Derris root, when crushed, releases rotenone. Some native residents of Fiji and New Guinea practice a form of fishing in which they crush the roots and throw them into the water. Plant in well-drained soil in a suitable position. Water during establishment.

Wikipedia contributors, CC BY-SA 4.0 — Derris elliptica