 With his work "Das entdeckte Geheimnis der Natur im Bau und in der Befruchtung der Blumen" (Berlin 1793), he was one of the founders of pollination ecology and floral biology as a scientific discipline.Together with one of his predecessors, Josef G. Köhlreuter, he is still the classic author in this field.While conducting his researches on plants, Sprengel appears to have neglected management of the school, which mainly served the rich and powerful.