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Chemical and electrophysiological studies on Sunn Pest

Chemical and electrophysiological studies on Sunn Pest

Hall, David R., Cork, Alan, Downham, Mark C.A., Farman, Dudley I., Innocenzi, Paul J. and El Bouhssini, Mustapha (2007) Chemical and electrophysiological studies on Sunn Pest. In: Parker, Bruce L., Skinner, Margaret, El Bouhssini, Mustapha and Kumari, Safaa G., (eds.) Sunn pest management: a decade of progress 1994-2004. Arab Society for Plant Protection, Beirut, Lebanon, pp. 147-156. ISBN 9789953010632

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Abstract

The Sunn Pest, Eurygaster integriceps Puton (Hemiptera; Heteroptera; Scutelleridae) is the most damaging insect pest of wheat and barley in countries of West Asia. Previous work has shown that adult males produce a number of chemicals, and these have been implicated in attraction between the sexes. Volatiles were collected from insects by air aeration and trapping on Porapak resin and solid-phase microextraction (SPME) fibers. Males produced large amounts of homo-γ-bisabolene identified previously and smaller amounts of bisabolene and vanillin. Ethyl acrylate could not be detected, although reported previously. Females did not produce any of these compounds. These compounds were produced by males only during the light period and only after reaching sexual maturity. When disturbed, both males and females produced (E)-2-hexenal, tridecane, (E)-2-octenal and (E)-4-oxo-2-hexenal, compounds shown to be produced from glands in the thorax and thought to play a role in defense against predators. In analyses of volatiles from male or female bugs by gas chromatography linked to electroantennographic (EAG) recording, no significant responses were obtained from male antennae. In most analyses, no EAG responses were obtained from the antennae of female bugs, but in a very few cases a response to the homo-γ-bisabolene in collections from male bugs was observed. This indicates that receptors for this component are present on the antennae of the female bugs and suggests that the compound may have a role in intraspecific communication.

Item Type: Book Section
Uncontrolled Keywords: Bisabolene, Eurygaster integriceps, Hemiptera, intraspecific communication, pheromone, Scutelleridae, semiochemicals, Sunn Pest, homo-γ-bisabolene, vanillin,
Subjects: Q Science > Q Science (General)
S Agriculture > S Agriculture (General)
Q Science > QL Zoology
S Agriculture > SB Plant culture
Faculty / Department / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Related URLs:
Last Modified: 11 Nov 2011 12:06
URI: http://gala.gre.ac.uk/id/eprint/2376

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