Action du jeûne et de Bacillus thuringiensis Berliner sur les protéines plasmatiques de Choristoneura fumiferana (Clem.) (Lepidoptera : Tortricidae)

Total protein contents of the hemolymph of Choristoneura fumiferana larvae, prepupae, and pupae were studied. These were electrophoretically separated into 14 bands, classified as slow moving and fast moving proteins. During the sixth instar, hemolymph protein contents increased eight to nine times in control larvae mainly owing to slow moving proteins. Protein concentration of slow moving proteins were less pronounced in larvae that were starved and treated with Bacillus thuringiensis, the treated larvae being more affected than the starved larvae. Larvae treated on day 1 of the 6th instar were more affected than those treated on day 4.