Identification of the Sex Pheromone of Isoceras sibirica Alpheraky (Lepidoptera, Cossidae)
We discovered that extracts of the female sex pheromone gland of the carpenterworm moth Isoceras sibirica Alpheraky, a pest of Asparagus offi cinalis Linn., contained (Z)-7- tetra decen-1-ol (Z7 - 14:OH), (Z)-9-tetradecen-1-ol (Z9 - 14:OH), (Z)-7-tetradecenyl acetate (Z7 - 14:Ac), (Z)-9-tetradecenyl acetate (Z9 - 14:Ac), and (Z)-9-hexadecadecenyl acetate (Z9 - 16:Ac). The average levels of the chemicals in a single sex pheromone gland of a calling moth were (0.71 ± 0.24) ng, (1.42 ± 0.44) ng, (4.36 ± 0.32) ng, (8.71 ± 0.26) ng, and (0.82 ± 0.38) ng, respectively. The electroantennography (EAG) analysis of these chemicals and their analogues demonstrated that Z9 - 14:Ac triggered signifi cantly the male EAG response. Traps with rubber septa lure impregnated with Z9 - 14:Ac (500 μg/septum), Z7 - 14:Ac (250 μg/septum), and Z9 - 16:Ac (50 μg/septum) were more effective in catching male moths than traps with other baits or virgin females. Addition of Z7 - 14:OH and Z9 - 14:OH to rubber septa did not enhance the effi ciency of the trap.