BIOL 312 Lecture Notes - Lecture 25: Parasitoid, Hymenoptera, Trigonalidae
14 Dec 2017
School
Department
Course
Professor
Document Summary
Diptera: evolved many times, probably from saprophagous (fed on dead/decaying animal tissue) ancestors. ), others from saprophagous ancestors, other from predaceous ancestors. Host location by parasitoids: three major methods: ovipositing females (almost all. Active first instar larvae (triungulin or planidium) (many diptera, coleoptera, rare in hymenoptera). Eggs laid on foliage that only hatch when ingested by hosts (caterpillars or sawflies) (diptera, one small family of. Parasitoid host use: all life stages attacked: egg, egg-larva, larva, pupa (most common), adult stages quite rarely attacked, egg and pupal parasitoids less host specific. Taxa attacked: virtually all insect groups, arachnids, sometimes centipedes, millipedes, snails. Hyperparasitoids (secondary parasitoids): some parasitoids attack other parasitoids, can be obligate or facultative, some tertiary and quaternary parasitoids, usually less host specific than primary parasitoids. Parasitoid host use strategies: ectoparasitoid vs endoparasitoid (endo usually more host specific because you have to deal with host"s immune system and physiology).
