OLD-WORLD PHEROMONE STRAIN IN THE NEW-WORLD - SEX ATTRACTANT COMPOSITION FOR THE CURRANT BORER, SYNANTHEDON TIPULIFORMIS CL. (LEPIDOPTERA, SESIIDAE), IN CANADA

The field attractivity of (E,Z)-2,13-octadecadienyl acetate (E,Z-2,13- 18:OAc) (30 mu g loaded on red rubber tubing) alone or in combination with (E,Z)-3,13-octadecadienyl acetate (E,Z-3,13-18:OAc) (0.9 mu g add ed) towards the male currant borer, Synanthedon tipuliformis Cl., (Lep idoptora: Sesiidae), was compared in British Columbia (B.C.) and in Qu ebec (Canada) by means of trapping trial. The binary mixture attracted males in significantly higher numbers into sticky traps than E,Z-2,13 -18:OAc alone [17.0 male captures/trap/inspection versus 1.7 in Langle y (B.C.), 32.7 versus 11.9 in De Roche (B.C.), and 5.3 versus 0.2 in I le d'Orleans (Que.), respectively]. These results suggest that the Can adian currant borer populations belong to the same strain as those in Europe and New Zealand, with E,Z-3,13-18:OAc remaining an important at tractant-synergistic component.