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The Deutsche Gesellschaft für Schädlingsbekämpfung mbH (translation: German Corporation for Pest control), in short Degesch, was a German chemical corporation. Degesch produced pesticides used against weeds, rodents and insects. Degesch had the patent of the infamous Zyklon, a pesticide whose "Zyklon B" variant (without odor or irritant) was used to execute people in gas chambers of German extermination camps during the Holocaust. Through the firms Tesch &amp; Stabenow GmbH (Testa) and Heerdt-Linger (Heli) Degesch sold the poisonous gas Zyklon B to the German Army and the Schutzstaffel (SS).