Dr Klaus Reinhardt of Tuebingen University examined the archives of the Entomological Institute at Dachau.
He found that biologists had looked at which mosquitoes might best be able to survive outside their natural habitat.
He speculates that such insects could have been dropped over enemy territory.
Heinrich Himmler, the leader of the SS, set up the institute at Dachau in 1942.Disease
The organisation's work was believed to have focused on insect-borne diseases such as typhus, which afflicted the camp inmates.