Despite evidence of widespread honeydew feeding among insects, the suitability of this type of food can vary for consumers depending on its quality, quantity and accessibility. We tested specific carbohydrate components of whitefly (Bemisia tabaci) honeydew using both an interspecific comparison and a dose-specific trial to examine the longevity effects of trehalulose feeding on parasitoid wasps. Insect-derived sugars were found to be comparable to plant-derived sugars as sources of nutrition for the parasitoid species tested. Although insect-derived components of honeydew have been shown to reduce longevity in other studies of parastoids, trehalulose feeding does not appear to have similar effects.