Abstract
Abstract Five white pine species were evaluated for their stand characteristics and white pine blister rust (Cronartium ribicola J.C. Fisch.) occurrence and incidence in 123 field plots established across their ranges in California. Tree data were collected on stem diameter, crown condition and position, and rust presence/absence; plot data included slope, aspect, elevation, Ribes cover, and climate factors associated with site. Crowns of live trees were generally healthy and crown positions varied by species. Stem diameters were smallest in whitebark pine (Pinus albicaulis Engelm.; WBP) and largest in Great Basin bristlecone pine (Pinus longaeva D.K. Bailey). For the two main species examined, western white pine (Pinus monticola Dougl.; WWP) and whitebark pine, ranked comparisons of rust incidence were significantly different between northern versus southern and western versus eastern Sierra Nevada plots, but were not significantly different between those species. In rust-confirmed WWP plots, eight signi...
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