Synthesis and field testing of 4,6,6-lineatin, the aggregation pheromone of Trypodendron lineatum (Coleoptera: Scolytidae).
It is reported that authentic 4,6,6-lineatin (3,3,7-trimethyl-2,9-dioxatricyclo[3.3.1.04,7]nonane), an attractant isolated from the frass of females of the forest pest Xyloterus lineatus (Ol.) (Trypodendron lineatum), was produced in low yield via 3 synthetic pathways in the laboratory in Canada. In field tests in a stand of Douglas fir (Pseudotsuga menziesii) in British Columbia in early spring in 1976 and 1978, mu g amounts of the product from all 3 syntheses attracted large numbers of both sexes of the scolytid. The results confirm that 4,6,6-lineatin is an aggregation pheromone.