CPSC 270 Lecture Notes - Lecture 5: Psocoptera, Crab Louse, Sucking Louse
27 Sep 2018
School
Department
Course
Professor
Document Summary
Herbivores; a few are pests, none major in the u. s. Most live in tree bark or on forest floors; some occur in buildings, particularly among older books. Feed on nonliving organic material, mostly innocuous. Formerly distinguished as chewing and sucking lice. Small, obligate ectoparasites of birds and mammals. Eggs (nits) glued to hairs or skin surface. Three species are human pests: head lice, body louse, crab or pubic louse. True bugs, leafhoppers, planthoppers, cicadas, aphids, whiteflies, scales. Piercing-sucking mouthparts, feed on fluids (plant sap, blood, liquified tissue) Many important pest and beneficial species, large order. Stationary, feed continuously and develop coating for protection. Common, but often not seen due to small size. Snakeflies (name shows that it is not a true bug. Some larvae with hollowed out mandibles for sucking fluid. Almost all are predators as larvae and adults. By far the largest order of insects. Weevils and others - chewing mouthparts at tip of an elongated snout .
