Abstract
The rearing of Anomala cuprea was conducted under the various programs of thermal change to search for the highest survival rate and the shortest duration of developmental period.
The mortality of 1st and 2nd instar larvae was high under cold temperature lower than 15°C. From the feeding stage to the yellow stage of 3rd instar larva, the mortality was low at every temperature examined between 15 and 30°C. During the period from prepupal stage to immature adult, the mortality was low at higher tem-peratures where they had passed through the low temperature (5°C) for more than 40 days from the latter period of 2nd instar to yellow larval stage. In this case the total duration of development was short and its standard deviation was small. The high survival rate during the development was obtained under the changing temperature conditions which were similar to the seasonal change of temperature from summer. Considering these results the most successful program of thermal change to raise this insect was suggested.
