Effects on the parasitoid Agria affinis (Fall.) (Diptera: Sarcophagidae) of small molecules in diets

摘要: Abstract Water balance in the insect parasitoid Agria affinis (Fall.) was upset when protein of rearing medium replaced with amino acid mixtures order to define chemical constituents medium. On tolerable dietary concentrations small molecules osmotic pressure blood tended be isosmotic But concentration water abnormally high. Growth and development were retarded acids increased beyond point at which normal blood. Glucose had similar effects but larval growth became while diet hypo-osmotic Attempts reduce some by supplying colloid polyvinyl-pyrrolidone only slightly successful. Thus rate insects, possibly other arthropods, on foods composed solutions molecules, particularly acids, may depend cases relation between properties aqueous food media animal's