OPTIMIZATION OF SYNTHETIC PHEROMONE BLEND FOR USE IN MONITORING CHORISTONEURA ROSACEANA (LEPIDOPTERA: TORTRICIDAE) IN NIAGARA PENINSULA, ONTARIO, APPLE ORCHARDS

摘要

Trapping experiments were carried out in Niagara peninsula, Ontario apple orchards to determine the optimum ratios of synthetic pheromone compounds for use in monitoring the obliquebanded leafroller, Choristoneura rosaceana (Harris) (Leptidoptera: Tortricidae). The mean total number of moths captured in traps baited with rubber stopper lures impregnated with 0.97 mg of the major compound (Z)-11-tetradecenyl acetate (Zll-14:OAc) increased 3-4-fold with the addition of 2% of the minor compound (E)-11-tetradecenyl acetate (E11-14:OAc) and increases to 4 and 8% did not change average catch. The addition of 1-8% of the minor compound (Z)-11-tetradecenol (Zll-14:OH) to lures containing 0.97 mg Zll-14:OAc + 2% E11-14:OAc did not affect average catch. Therewas a 3.5-3.8-fold increase in catch when 0.97 mg Zll-14:OAc + 2% E11-14:OAc + 1.5% Zll-14:OH was combined with 1% of the minor compound (Z)-ll-tetradecenal (Zl 1-14: Aid). Mean trap catch declined when the relative amount of Zll-14:Ald was >4%. There was a 2.3-3.7-fold increase mean trap catch when 0.97 mg Zll-14:OAc + 1.5% mg Zl l-14:OH + 1% Zl l-14:Ald was combined with 1% El l-14:OAc. There was no increase in catch with additional increases in the relative amount of E11-14:OAc. There was a 1.8-2.3-fold decrease in catch when 2% Zll-14:OH was combined with 0.97 mg Zll-14:OAc + 2% E11-14:OAc + 1% Zl 1-14:Aid. There was no change in mean trap catch with the addition of greater relative amounts of Zl l-14:OH. The results suggest that the optimum blend of synthetic pheromone compounds for use in monitoring C. rosaceana in the Niagara peninsula of Ontario is a blend of the main compound Zll-14:OAc plus the minor compounds in relative amounts of 1% E11-14:OAc, 0-1% Zll-14:OH and 1% Zll-14:Ald.