Behavioral effects of secondary components of sex pheromone of western spruce budworm (Choristoneura occidentalis) free
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In a laboratory wind tunnel, upwind flight and close-range orientation to a pheromone source by maleC. occidentalis were facilitated by the addition of the secondary componentsE/Z11-tetradecen-1-ol acetate (89∶11) andE/Z11-tetradecen-1-ol (85∶15) to low source concentrations of the primary components,E/Z11-tetradecenal (92∶8). Male responses to the blends tested never equalled their responses to virgin females. The primary components alone, when released at a rate similar to that of a “calling” female, never elicited male upwind flight or source location. However, the addition of the secondary components enhanced these behavioral sequences.
Key wordsChoristoneura occidentalis western spruce budworm Lepidoptera Tortricidae pheromones behavior wind tunnel
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