Male-produced sex attractant pheromone of the green stink bug, Acrosternumhilare (Say)

Citation
Hl. Mcbrien et al., Male-produced sex attractant pheromone of the green stink bug, Acrosternumhilare (Say), J CHEM ECOL, 27(9), 2001, pp. 1821-1839
Citations number
41
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF CHEMICAL ECOLOGY
ISSN journal
0098-0331 → ACNP
Volume
27
Issue
9
Year of publication
2001
Pages
1821 - 1839
Database
ISI
SICI code
0098-0331(200109)27:9<1821:MSAPOT>2.0.ZU;2-Y
Abstract
Sexually mature virgin adult males of the green stink bug, Acrosternum hila re attracted sexually mature virgin adult females in laboratory bioassays u sing a vertical Y-tube. There was no indication that males attracted other males. or that females attracted either sex. These results suggested that A . hilare males produce a sex pheromone, Extracts of odors collected from se xually mature males contained compounds that were not present in extracts f rom females or sexually immature males. (4S)-Cis-(Z)-bisabolene epoxide ((4 S)-cis-Z-BAE) was the major sex-specific component of the extract. The crud e extract was attractive to female A. hilare, but when separated into four fractions, only the portion containing (4S)-cis-Z-BAE and the minor compone nt (4S)-trans-Z-BAE was attractive to females, This fraction was as attract ive as the crude extract, suggesting that the former contained all the pher omone components. Neither synthetic (4S)-cis-Z-BAE nor (4S)-trans-Z-BAE alo ne was attractive to females, but a 95:5 cis:trans blend, mimicing the rati o naturally produced by males, was attractive to females in Y-tube bioassay s. Bioassays in a field cage showed that significantly more A. hilare femal es were attracted to cotton string lures treated with I mg of a 95:5 blend of (4S)-cis-Z-BAE and (4S)-trans-Z-BAE placed inside a bouquet of alfalfa t han to an alfalfa bouquet containing a pentane-treated control. In field ca ge studies, attraction of females was greatest during the late afternoon an d evening hours, and female A. hilare approached the synthetic pheromone so urce almost exclusively by walking.