pinus aristata/blister

White pine blister rust caused by Cronartium ribicola was introduced into North America in the early 20th century and is spreading throughout the range of five-needle pines. In northern Colorado, this pathogen was first observed in 1998 on limber pine (Pinus flexilis) (1). It has not been reported

The Jarbidge Mountains are a remote and little-visited desert mountain range at the northern edge of the Great Basin in Elko County, NV, 110 km north of Elko and 115 km southwest of Twin Falls, ID. The forest is dominated by subalpine fir (Abies lasiocarpa) at lower elevations and whitebark pine

In June 1999, a survey was conducted north and west of Redfeather Lakes, CO (≈64 km northwest of Fort Collins) to determine the extent of white pine blister rust, caused by Cronartium ribicola. To date the disease has not been reported in Colorado on any of the known hosts. The survey was initiated

ABSTRACT Four of eight white pine species native to western North America surveyed for resistance to white pine blister rust by artificial inoculation showed classical hypersensitive reactions (HR) at frequencies ranging from very low to moderate. Mendelian segregation, indicating a single dominant