Attraction, Attack Patterns and Seasonal Activity of the Black Turpentine Beetle1

Abstract
An aggregating pheromone was demonstrated to be produced by virgin females and/or males of the black turpentine beetle, Dendroctonus terebrans (Olivier). Attraction produced by females was slightly stronger with evidence that females are primarily the gallery initiating sex and males the responding sex. Duration of attack period on an individual tree, Pinus taeda, lasts ca. 11 wk but with most of the activity occurring in the 1st 5 weeks. Flight and attack activity occurs principally from March through October with at least 3 overlapping generations/year.

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