Tesch & Stabenow
Tesch & Stabenow (Testa) was a pest-control company headquartered in Hamburg, Germany, established in 1924. They used a broad variety of methods and techniques. One chemical used was Zyklon B with its active ingredient hydrogen cyanide. Bruno Tesch had been involved in the development of Zyklon B, but the DEGESCH (Deutsche Gesellschaft für Schädlingsbekämpfung, German…