Abstract
Insects occasionally appear in the heat-processed foods, for example, biscuit and a-powder, during their storage. And it has been considered that the eggs of insects in the raw materials of foods metamorphosed.
We studied on the dying temperature of eggs of Tribolium castameum, one of stored grain pests, and the results were as follows:
Eggs were killed completely by heating at about 50°C for 30 minutes. Eggs and insects were killed also by the low temperature.
It is considered that the appearance of the insects in the heat processed foods are not resulted by the eggs in the raw materials, but by the invasion from the outside.
