Synovigenic
Guides
Glypta fumiferanae
Glypta fumiferanae is an ichneumonid wasp that parasitizes spruce budworm larvae (Choristoneura fumiferana and C. occidentalis). As an endoparasitoid, females deposit eggs inside host larvae, and developing wasp offspring consume the host from within. This species is a significant natural enemy of spruce budworm, a major defoliator of coniferous forests in North America. Adult females are synovigenic and require carbohydrate feeding (honey) for extended longevity and high fecundity; unfed adults survive only 2–5 days and produce far fewer eggs.
Lysibia
Lysibia is a genus of hyperparasitoid wasps in the family Ichneumonidae. The best-studied species, Lysibia nana, is a solitary secondary idiobiont hyperparasitoid that attacks pre-pupae and pupae of gregarious braconid parasitoids in the genus Cotesia, particularly C. glomerata. These wasps are winged, synovigenic (emerging without mature eggs), and do not host-feed as adults. They locate hosts using chemical cues including kairomones from the primary parasitoid and herbivore-induced plant volatiles. The genus is part of the overwintering Apanteles-Tetrastichus-Lysibia complex associated with pierid butterfly hosts.
Venturia canescens
Venturia canescens is a solitary koinobiont endoparasitoid wasp in the family Ichneumonidae. The species exhibits both sexual and asexual (parthenogenetic) populations, with the asexual strain being highly synovigenic—continuing egg maturation throughout adult life. Females inject virus-like particles (VLPs) derived from an integrated nudivirus into host larvae during oviposition; these VLPs suppress the host immune system and prevent encapsulation of the parasitoid egg. The species is a significant biological control agent of stored-product pests, particularly pyralid moth larvae.