P.J. Silk and E.G. Kettela
SERG Project # 2001/04
Males and females of jack pine budworm, Choristoneura pinus pinus Free., gave good electroantennogram -detector (EAD) responses to host volatiles α-pinene, β-pinene, terpinolene, 3-carene, and especially (-)-bornyl acetate. Spruce budworm, Choristoneura fumiferana, males and females gave little or no EAD response to spruce/fir or pine volatiles.
Traps baited with pheromone (9/1 of 85/15 E/Z11-14:Acetate and 85/15 E/Z11-14:OH) placed on host (jack pine, Pinus banksiana Lamb.) and non-host (white spruce, Picea glauca Moench (Voss)) trees showed no significant differences in trap-capture rates, although higher replication may detect differences since there is a trend in this direction.
Traps baited with pheromone + α / β -pinene + bornyl acetate captured significantly higher numbers (P<0.1) of moths than traps baited with pheromone alone. For jack pine budworm, host kairomones appear to be involved in host and/or mate location by conspecifics.
Further EAD, wind tunnel and field trapping studies are therefore warranted and planned. Chemical and EAD analyses of volatiles from pine, spruce, and fir foliage are also underway.