During 1998 - 2000 we established plots in ponderosa pine stands infested by mountain pine beetle and in baseline stands. A model was developed to estimate the probability of infestation based on stand conditions. All trees larger than 6 inches in diameter at breast height were cored. Tree ring were cross-dated and measured. We observed significant reductions in basal area increments in infested stands and increased likelihood of infestation with increased ponderosa pine basal area.
Species 1: Coleoptera Scolytidae Dendroctonus ponderosae (mountain pine beetle)
Keywords: tree resistance, bark beetles
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