title: Aggregation pheromone of square-necked grain beetle,Cathartus quadricollis (Guér.).
abstract: When feeding on rolled oats, male square-necked grain beetles,Cathartus quadricollis (Guér.), produced the aggregation pheromone (3R,6E)-7-methyl-6-nonen-3-yl acetate, for which the trival name "quadrilure" is proposed. The pheromone was highly attractive to both sexes in a two-choice, pitfall olfactometer modified to retain responding beetles by placing a food stimulus (an oat flake) in the glass vials containing the experimental and control stimuli. TheS enantiomer of the pheromone was inactive. Males also produced small amounts of (E)-7-methyl-6-nonen-3-one, (E)-7-methyl-6-nonen-3-ol, and (6E)-7-methyl-3-propyl-2,6-nonadienyl acetate, but these compounds were inactive in the laboratory bioassay. Segregated males and females both produced (R)-(-)-1-octen-3-ol, which by itself was repellent to both sexes but did not diminish beetle response to the aggregation pheromone.
authors.affiliation: Department of Chemistry, Simon Fraser University, V5A 1S6, Burnaby, British Columbia, Canada.
authors.forename: H D
authors.initials: HD
authors.lastname: Pierce
authors.forename: A M
authors.initials: AM
authors.lastname: Pierce
authors.forename: B D
authors.initials: BD
authors.lastname: Johnston
authors.forename: A C
authors.initials: AC
authors.lastname: Oehlschlager
authors.forename: J H
authors.initials: JH
authors.lastname: Borden