GRAIN WEEVIL, SITOPHILUS-GRANARIUS (L) - ANTENNAL AND BEHAVIORAL-RESPONSES TO MALE-PRODUCED VOLATILES

Citation
J. Chambers et al., GRAIN WEEVIL, SITOPHILUS-GRANARIUS (L) - ANTENNAL AND BEHAVIORAL-RESPONSES TO MALE-PRODUCED VOLATILES, Journal of chemical ecology, 22(9), 1996, pp. 1639-1654
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Ecology,Biology
Journal title
ISSN journal
0098-0331
Volume
22
Issue
9
Year of publication
1996
Pages
1639 - 1654
Database
ISI
SICI code
0098-0331(1996)22:9<1639:GWS(-A>2.0.ZU;2-#
Abstract
Coupled GC-EAG techniques have been applied to the study of volatiles from the grain weevil, Sitophilus granarius, for the first time. The s ize of EAG response was independent of the sex of the responding insec t but was consistently larger to extracts of males than those of femal es. This difference was reflected in a behavioral preference for the m ale extracts by mated adults of both sexes tested together and virgin adults of both sexes tested separately. The GC-EAG results provide evi dence for two materials that are released specifically by the males. U sing circular dichroism, one has been found to be identical stereochem ically with the (2S,3R)-sitophilate reported by others as the aggregat ion pheromone in a different strain. This enhances the prospects for t he development of a single pheromone lure that would be generally appl icable whatever the origin of the strain. The small amount of sitophil ate found in the males suggests that it is not stored in large amounts . The other material, present in such a small amount that it has yet t o be fully characterized, elicits a higher antennal activity than sito philate and may have a significant role to play in enhancing the trap catch of this economically important pest.