抄録
The dietary value of sugar (C) and protein (N) in the development of larvae of the oriental corn borer, Ostrinia furnacalis (GUENEE), was evaluated in items of larval weight, survival, growth rate an population age structure using synthetic artificial diets with different C/N ratios (the C+N level being about 50% of the dry weight). The larvae grew fast, attained high weights, had a high rate of survival, and formed populations with a high proportion of old larvae on diets with a CN ratio of about 1:1. Larvae on diets with lower or higher C/N ratios, had slower growth rates, lower body weights, shorter survival rates and younger population age structure. The developmental pattern of larvae in response to dietary C/N ratio in three types of diet in which C+N levels were 80, 40 or 20% of the dry weight was fundamentally the same as that of those on the basic diet with 50% C+N. Larval growth on these three types of diet was not as good as that on the original formulation. These results show that both the C/N ratio and the total C+N level in the diet are important for optimum larval development.
