title: Dendroctonus pseudotsugae: A Hypothesis Regarding Its Primary Attractant.
abstract: The Douglas-fir beetle is attracted to alpha-pinene but repelled by beta-pinene. Attacks on standing trees are related to the content of alpha- or beta-pinene in the tree; this correlation suggests that volatile oils may be the stimuli initially attracting the insect to the Douglas fir.
authors.forename: H J
authors.initials: HJ
authors.lastname: Heikkenen
authors.forename: B F
authors.initials: BF
authors.lastname: Hrutfiord