Dauerzucht von Diprion pini L. (Hym.: Diprionidae) im Laboratorium unter Berücksichtigung der Fotoperiode

Abstract

Permanent culturing of Diprion pini L with regard to photoperiodic conditions

Diprion pini can be permanently cultured in the laboratory under longday conditions (17/7 hours photo-scoto-phase). At 25 °C and about 80% rel. humidity one generation will be completed on the average within 40–50 days and at 20 °C within 50–55 days. Thus, 6–7 generations per year may be raised. The sensitive phase at which longday treatment prevents diapause is 30–10 days before cocoon spinning. The breeding technique used is described.