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Sexual behavior of male moths after prolonged exposure to the 1-ng pheromone/m(3) air previously measured in orchards treated with pheromone for mating disruption was examined in a flight tunnel. The exposure of Grapholita molesta (Busck) to 1-ng (Z)-8-dodecen-1-yl acetate  (Z8-12:OAc)/m(3) air for 15 min had no effect on their ability to fly upwind to a conspecific, virgin calling female. After 30 min of exposure, males exposed to a control treatment were 1.4× more likely orient to a female than males exposed to pheromone-treated air. Some  G. molesta males retained the ability to orient to a female after a 30-min exposure period when the aerial concentration of Z8-12:OAc was increased 500,000× to 0.5 gm/m(3). Prolonged exposure to Z8-12:OAc did not affect response to a synthetic pheromone  lure. The time required to initiate behavioral responses to a female or a lure was not affected by pheromone exposure. Male Choristoneura rosaceana (Harris) exposed to a control treatment for 15 min were 38.5× more likely to orient to a conspecific, virgin calling female than  males exposed to 1-ng (Z)-11-tetradecen-1-yl acetate (Z11-14:OAc)/m(3) air for 15 min. After 30 min of exposure males were unable to fly upwind to a female. Males exposed to a control treatment for 15 min were 4.3× more likely to fly upwind to a synthetic pheromone lure  than males exposed to 1-ng Z11-14:OAc/m(3) air for 15 min. The time required to initiate behavioral responses to a female or a lure was not affected by exposure to pheromone.

environmental entomology

Sexual Behavior of &lt;I&gt;Grapholita molesta&lt;/I&gt; and &lt;I&gt;Choristoneura rosaceana&lt;/I&gt; (Lepidoptera: Tortricidae) in a Flight Tunnel After Prolonged Exposure to the Aerial Concentration of Pheromone Previously Measured in Orchards Treated With Pheromone for Mating Disruption