[4] Some species parasitized by Glyptapanteles include Lymantria dispar,[5] Chrysodeixis chalcites, Thyrinteina leucocerae (both pictured), and Acronicta rumicis.

According to a study done in South Korea on the species G. liparidis, the parasitoid tends to prefer to feed on the second-instar A. rumicis larva, indicating that the stage of caterpillar life may have significant role in maximizing nutrient intake.

[7] It has been demonstrated in experimental research (Grosman, et al.) that this behavior is to strike at and repel possible predators of the pupae, such as the shield bug Supputius cincticeps, thus improving their survival odds.

[10] G. flavicoxis, G. porthetriae and G. militaris have been evaluated by the USDA as possible bio-control agents for containing the invasive spongy moth (Lymantria dispar) population in the United States.

[11][12] Research has indicated that Pseudaletia unipuncta hosts fed fresh perennial ryegrass (Lolium perenne) leaves are optimal for the mass-breeding of G.