Insect Chemistry

Insect Chemistry - • go back and forth across this conic...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Insect Chemistry Semiochemicals – The gerneral term for all chemicals involved in communications o Pheromones – chemical messages induce a behavioral reaction or physiological process among individuals o Can use pheromones to disrupt the mating process of pests Light Brown Apple Moth – attacks over 250 species of plants Evidence of pheromones first reported by Faber in the 1870s Identification of a pheromone was first done by Butenandt in 1959 found for the silkworm Moth not a single compound, but a blend of many compounds Pheromones in social insects act as alarm, defense, Trail and Recruitment, o trail pheromones used extensively by ants o anti-aphrodisiac used by males during mating to keep other males away queen pheromone o colony productivity and inhibits ovary development pheromones are released in a conic area only need a several parts per million to detect a female
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: • go back and forth across this conic area to find female o humans use this to advantage, blanket the area in the female’s pheromone so they can’t find the female • Kairomones – chemical cues between individuals of different species that benefit the receiver o used by parasites to find victims • Allomones – chemical cues between individuals of different species that benefit the emitter o typically these are defensive compounds o hemolymph – Toxins or feeding deterrents either produced or sequestered exocrine glands – cuticular pouches, poison sacs reflex bleeding – exudes a drop of hemolymph o eversible glands – hide glands that are then covered with something to deter a predator o aposematic signals – “blue jay experiment” –fed monarch butterfly and got sick o saliva – spitting by some assassin bugs...
View Full Document

This document was uploaded on 04/04/2008.

Ask a homework question - tutors are online