The Canadian Entomologist

Table of Contents - April 1981 - Volume 113, Issue 04  

Articles

PINE OIL PROTECTS LIVING TREES FROM ATTACK BY THREE BARK BEETLE SPECIES, DENDROCTONUS SPP. (COLEOPTERA: SCOLYTIDAE)

W. W. Nijholta1, L. H. McMullena1 and L. Safranyika1

a1 Pacific Forest Research Centre, Canadian Forestry Service, Victoria, British Columbia V8Z 1M5

Abstract

Pine oil, a by-product of sulphate wood pulping, protected pheromone-baited, living Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), lodgepole pine (Pinus contorta Dougl.), and spruce (Picea glauca (Moench) Voss - P. engelmannii Parry hybrids) from attack by Douglas-fir beetle (Dendroctonus pseudotsugae Hopk.), mountain pine beetle (D. ponderosa Hopk.), and spruce beetle (D. rufipennis (Kirby)), respectively. Pine oil also protected surrounding trees and reduced attack incidence on Douglas-fir, lodgepole pine, and spruce within at least a 10 m radius. α-Terpineol, one of the constituents of the pine oil mixture, was less effective.

Résumé

L’huile de pin, un sous-produit dérivé de la pé de bois au sulfate, a protégé le Douglas taxifolié (Pseudotsuga menziesii {Mirb.} Franco), le pin lodgepole (Pinus contorta Dougl.) et des hybrides de l’épinette (Picea glauca {Moench} Voss et P. engelmannii Parry) traités avec des appâts vivants de phéromones contre les attaques du dendroctone du Douglas (Dendroctonus pseudotsuga Hopk.), du dendroctone du pin ponderosa (D. ponderosa Hopk.) et du dendroctone de l’épinette (D. rufipennis {Kirby}), respectivement. De plus, l’huile de pin a protégé les arbres environnants et a réduit l’incidence des attaques sur le Douglas taxifolié, le pin lodgepole et l’épinette à l’intérieur d’un rayon d’au moins 10 mètres. L’α-terpinéol, un des composants de la solution d’huile de pin, a été moins efficace.

(Received December 12 1980)

(Accepted March 03 1981)

Related Content