Journal of Economic Entomology (1998) 91, 715-722

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Allen E. Knutson, Marvin K. Harris and Jocelyn G. Millar (1998)
Effects of pheromone dose, lure age, and trap design on capture of male pecan casebearer (Lepidoptera: Pyralidae) in pheromone-baited traps
Journal of Economic Entomology 91 (3), 715-722
Abstract: Components of a pheromone-monitoring system for the pecan nut casebearer, Acrobasis nuxvorella Neunzig, were evaluated in pecan orchards in central Texas. In 3 trials, traps baited with 33, 100, and 333 µg of the single-component pheromone (9E,11Z) -hexadecadienal captured equal number of moths, whereas lower doses captured significantly fewer moths. In the 4th trial, significantly fewer moths were captured in traps baited with the 333-µg dose than the 33- or 100-µg dose. Grey rubber septa loaded with 100 µg of pheromone remained attractive for at least 15 wk in the field during the spring. Also lures field-aged for 30 d revealed no significant change in isomer composition of the pheromone. The addition of several likely insect-produced analogs of the pheromone or impurities in the synthetic pheromone did not significantly affect trap catch in 2 of the 3 trials. In a 3rd trial, the addition of (9E,11Z)-hexadecadienyl acetate significantly increased trap catch. The Pherocon 1CP, Pherocon 1C, and Intercept-A traps captured significantly more moths than Pherocon III Delta traps in 3 of the 4 trials. Of these trap designs, the Intercept-A captured the least number of nontarget insects and was the most convenient to service. The nonsticky Multipher 1 and Unitrap traps captured few moths. Moth phenology as determined by pheromone traps from late April to early June was consistent with published field data and developmental models. Results indicate pheromone traps baited with (9E,11Z) -hexadecadienaI provide a reliable tool for monitoring flights of the pecan nut casebearer.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Allen E. Knutson, Jocelyn G. Millar

Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Acrobasis nuxvorella Pecan/hickory (Carya) U.S.A. (mid S)