Variation in damage among Pinuscontorta provenances caused by the needle cast fungus Lophodermellaconcolor

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Abstract
Fifty-three family-structured provenances of lodgepole pine (Pinuscontorta var. latifolia) growing at a single test site near Prince George, British Columbia, were rated visually by two different methods for needle casting caused by Lophodermellaconcolor in 1982 and 1984. Analysis of variance indicated little variation due to families and much due to provenance. There were consistent year-to-year trends among the provenances and the two rating methods correlated by 0.9. This variation was significantly correlated with longitude and elevation but only slightly with latitude. Damage among the 41 provenances that are adapted to the continental climate of interior British Columbia increased with elevation.

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