Bruno Tesch, German chemist and businessman (b. 1890)
Bruno Emil Tesch (14 August 1890 – 16 May 1946) was a German chemist and entrepreneur. Together with Gerhard Peters and Walter Heerdt, he invented the insecticide Zyklon B. He was the owner of Tesch & Stabenow (called Testa), a pest control company he co-founded in 1924 with Paul Stabenow in Hamburg, Germany.Following the end of World War II, he was arrested by the British as a war criminal, tried, and executed.