| Parasitoids is an important factor in regulating insect population dunamics.A dominant parasitoid, Campoletis chorideae Uchida (Hymenoptera: Ichneumonidae),which attacked two important lepidoptera pests cotton budworm ,Helicoverpa armigera Hubner,and tobacco budworm H. assulta Guenee.We selected C. chorideae- H. armigera system as the subject of research and incorporated physiology into parasitoid behavioral ecology to study the physiological mechanism of parasitoids' foraging behavior.We mainly make research on effects of parasitism by C. chorideae on the hemolymph and total body composition of H. armigera, effects of sugar feeding on carbohydrate,lipid and protein metabolism in C. chorideae, the difference of the main metabolite concentrations and egg loads between ovipositing C. chorideae females and nonovipositing C. chorideae females,effects of different sugar diets on the metabolite concentrations in C. chorideae and elementary anatomy of internal reproductive system of C. chorideae females. The main results are as follows:1.The univariate analysis of effects of different sugar diets on the metabolite concentrations in C. chorideae show that glycogen levels was the highest in C. chorideae fed with 10% honey solution in both females and males; and there were significant difference between C. chorideae females with honey solution and other females with glucose,sucrose or water only for glycogen levels;and there were significant difference on glycogen levels between C. chorideae males with honey solution and males with water only.At the same time,we found that glycogen levels was the lowest in starved C. chorideae.Lipid levels was the highest in C. chorideae fed with 10% honey solution in both females and males,but lipid levels was the lowest in starved C. chorideae; there were no significant difference among C. chorideae with different diets.Besides,there were no significant difference on protein levels among C. chorideae females with different diets ; there were significant...
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