Biology 3484A/B Lecture Notes - Lecture 18: Apocrita, Parasitoid, Hymenoptera

• School: Western University
• Department: Biology
• Course: Biology 3484A/B
• Professor: Nina Zitani

Document Summary

Ectoparasitoid: wasp larva feeds on outside of host body. Endoparasitoid: wasp larva feeds on inside of host body. Genus meteorus all species are larval-larval endoparasitoids. Ectoparasitoid female lays egg on host not inside it. Venom: oviposition; laying eggs, venom; all adult female parasitoids have venom, or substances injected through ovipositor, that paralyze or subdue the host before or during oviposition, not defensive venom. Idiobiosis: female wasp permanently paralyzes host w venom, lays eggs on or inside host, wasp larva consumes living but paralyzed host, host dies, most are ectoparasitoids. Koinobiosis: female was temporarily paralyzes host w venom or not at all, lays eggs in or on host, host eventually resumes feeding/developing while was larva is feeding/developing on/in it, host dies, most are endoparasitoids. Ectoparasitic idiobiosis (basal condition: hosts tend to be mature, need to be large enough to feed wasp at time of oviposition, most wasps are generalists; can use a wider variety of host taxa.