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Status And Trends Of Mountain Pine Beetle Populations In The Bear Mountain And White House Gulch Areas On The Harney Ranger District, Black Hills National Forest, South Dakota, Judith E. Pasek, Willis C. Schaupp Jr
Status And Trends Of Mountain Pine Beetle Populations In The Bear Mountain And White House Gulch Areas On The Harney Ranger District, Black Hills National Forest, South Dakota, Judith E. Pasek, Willis C. Schaupp Jr
Judith E Pasek
Increasing and epidemic populations of the mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae) were detected and evaluated in the southcentral Black Hills. Mortality of ponderosa pine, Pinus ponderosa Dougl. ex Laws., in the area increased each year since 1988 and was six times greater in 1991 than in 1989. Survey results indicate an average of 29 trees killed per acre by this bark beetle from 1989 through 1991 in the Bearhouse project area. Infestation is especially concentrated in the Bear Mountain Basin area, where between 27 and 103 trees per acre have been killed, and a large beetle population …