Journal of Entomological Science (2001) 36, 251-258

Jorge E. Macías-Sámano and John H. Borden (2001)
Semiochemical interactions between Scolytus ventralis LeConte and Pityokteines elegans (Swaine) (Coleoptera: Scolytidae)
Journal of Entomological Science 36 (3), 251-258
Abstract: Two experiments evaluated the effect of baiting uninfested grand fir logs and trees undergoing initial attack by Scolytus ventralis LeConte with Pityokteines elegans (Swaine) pheromone, on the subsequent attack by both species. Two more experiments assessed the effect of synthetic bark oil, exo-brevicomin, and P. elegans pheromone on the response by each species to multiple-funnel traps baited with attractants for the other species. The pheromone of P. elegans on unattacked logs did not have an inhibitory effect on the attack by S. ventralis. However, trees attacked by S. ventralis that were baited with P. elegans pheromone just after attack, yielded significantly fewer S. ventralis progeny than the unbaited controls. Neither synthetic bark oil nor exo-brevicomin caused a significant change in the catch of P. elegans in traps baited with its pheromone, but the predator Thanasimus undatulus Say was caught in traps baited with (±)-ipsenol, (±)-ipsdienol and synthetic bark oil, and another predator, Enoclerus sphegeus F., was caught in traps baited with exo-brevicomin alone or in combination with ipsenol and ipsdienol. The results do not support the hypothesis that interference competition based on semiochemical communication occurs between the two species.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): John H. Borden, Jorge E. Macias-Samano

Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps
environment - cropping system/rotation
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Pityokteines elegans	Fir (Abies)
	Scolytus ventralis	Fir (Abies)
Thanasimus undatulus (predator)
Enoclerus sphegeus (predator)