Some laboratory observations on the rates of development, mortality and oviposition of Dermestes frischii (Kug.) (Col., Dermestidae)

Abstract

Abstract The rates of development, mortality and oviposition of an Aden strain of Dermestes frischii (Kug.) have been determined at a number of sets of conditions. The ranges for development are 20–35°C and 30–90 per cent r.h. with the most rapid development at 35°C and 90 per cent r.h. The highest survival to the adult stage was found at 25°C and 75 per cent r.h. The heaviest beetles were formed at 25°C and 90 per cent r.h. Oviposition occurred at all conditions examined, except 25°C and 30 per cent r.h., and was highest at 30°C and 90 per cent r.h. The highest intrinsic rate of increase was seen at 30°C and 90 per cent r.h. The presence of salt in the fishmeal increased the developmental period and mortality and reduced oviposition and the rate of increase. The data support previous field observations on the value of thorough salting and drying of fish for the control of D. frischii.