In Memoriam: Peter Hättenschwiler 26.09.1927–17.08.2021

• Thomas Sobczyk,
• Wilfried Arnscheid,
• Michael Greeff

Affiliations

Thomas Sobczyk

Diesterwegstraße 28

Wilfried Arnscheid

Im Ostholz 58

Michael Greeff

ETH Zürich, Department of Environmental Systems Science, Biocommunication and Entomology