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Effects of dietary carbohydrate on the nutritional physiology and blood sugar level of Trichoplusia ni parasitized by the insect parasite, Hyposoter exiguae

Published online by Cambridge University Press:  06 April 2009

S. N. Thompson
S. N. Thompson
Affiliation:
Division of Biological Control, University of California, Riverside, California 92521
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Summary

The effects of parasitization by Hyposoter exiguae on the nutritional physiology of Trichoplusia ni were influenced by the dietary sucrose level. The results confirmed that host nutrition plays a significant role in the manifestation of parasitic infection during the insect parasite-host association. Increased dietary sucrose level resulted in an increase in haemolymph trehalose concentration in both control and parasitized insects, but the increase was greater in the latter group. However, when the sucrose level was increased without energetic compensation and the dietary casein level was maintained constant, the haemolymph trehalose concentration was affected very little in unparasitized individuals but was markedly elevated in parasitized hosts. This result suggests that the de novo synthesis of carbohydrate in parasitized T. ni may not be regulated by dietary sugar intake.

Type
Research Article
Information
Parasitology , Volume 92 , Issue 1 , February 1986 , pp. 25 - 30
Copyright
Copyright © Cambridge University Press 1986

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