Optimum Egg Gallery Densities for the Mountain Pine Beetle in Relation to Lodgepole Pine Phloem Thickness

摘要

Laboratory studies were conducted to determine optimum densities of egg galleries constructed by the mountain pine beetle (Dendroctonus ponderosae) in lodgepole pine (Pinus contorta) phloem of different thickness. Beetle production per unit area of lodgepole pine bark occurred at egg gallery densities over 2.4 m per 30.4 sq cm with greater production obtained from thick phloem.