J. ent. Soc. Ont. V 143, 2012
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Volume 143, 2012 I. FROM THE EDITOR ... 1 [PDF] II. ARTICLES R. M. TRIMBLE — Optimization of synthetic pheromone blend for use in monitoring Choristoneura rosaceana (Lepidoptera: Tortricidae) in Niagara Penninsula, Ontario, apple orchards ... 3–14 [PDF] OPTIMIZATION OF SYNTHETIC PHEROMONE BLEND FOR USE IN MONITORING CHORISTONEURA ROSACEANA (LEPIDOPTERA: TORTRICIDAE) IN NIAGARA PENINSULA, ONTARIO, APPLE ORCHARDS R. M. TRIMBLE Southern Crop Protection and Food Research Centre Agriculture & Agri-Food Canada Vineland Station, ON L0R 2E0 e-mail: trimbler@agr.gc.ca J. ent. Soc. Ont. V 143, 2012 Abstract 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 (Z11-14: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 (Z11-14:OH) to lures containing 0.97 mg Z11-14:OAc + 2% E11-14:OAc did not affect average catch. There was a 3.5–3.8-fold increase in catch when 0.97 mg Z11-14:OAc + 2% E11-14:OAc + 1.5% Z11-14:OH was combined with 1% of the minor compound (Z)-11-tetradecenal (Z11-14:Ald). Mean trap catch declined when the relative amount of Z11-14:Ald was ≥4%. There was a 2.3–3.7-fold increase mean trap catch when 0.97 mg Z11-14:OAc + 1.5% mg Z11-14:OH + 1% Z11-14:Ald was combined with 1% E11-14: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% Z11-14:OH was combined with 0.97 mg Z11-14:OAc + 2% E11-14:OAc + 1% Z11-14:Ald. There was no change in mean trap catch with the addition of greater relative amounts of Z11-14: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 Z11-14:OAc plus the minor compounds in relative amounts of 1% E11-14:OAc, 0–1% Z11-14:OH and 1% Z11-14:Ald. |
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