First Report of the White Pine Blister Rust Fungus, Cronartium ribicola, on Pedicularis bracteosa

Characterization of Five Novel Mitoviruses in the White Pine Blister Rust Fungus Cronartium ribicola

The white pine blister rust (WPBR) fungus Cronartium ribicola (J.C. Fisch.) is an exotic invasive forest pathogen causing severe stem canker disease of native white pine trees (subgenus Strobus) in North America. The present study reports discovery of five novel mitoviruses in C. ribicola by deep RNA sequencing. The complete genome of each mitovirus was determined by rapid amplification of cDNA...

Histology of White Pine Blister Rust in Needles of Resistant and Susceptible Eastern White Pine

Corresponding author: K

The fungal pathogen Cronartium ribicola J.C. Fischer, causal agent of white pine blister rust (WPBR), was introduced to the eastern United States about 1898 (11). Hosts for the fungus include fiveneedle pines (Pinus sp. section Quinquefoliae) and currants and gooseberries (Ribes sp.). Natural infection of wild populations of Pedicularis bracteosa Benth and Castilleja Mutis ex L.f. have also bee...

Severe White Pine Blister Rust Infection in Whitebark Pine Alters Mountain Pine Beetle (Coleoptera: Curculionidae) Attack Density, Emergence Rate, and Body Size.

Exotic tree pathogens can cause devastating ecological effects on forests that can be exacerbated when infections increase the likelihood of attack by insects. Current high rates of mortality of whitebark pine (Pinus albicaulis Engelm.) are due to white pine blister rust caused by the exotic fungus, Cronartium ribicola J.C. Fisch, and the native mountain pine beetle (Dendroctonus ponderosae Hop...

White Pine Blister Rust in High-Elevation White Pines: Screening for Simply-Inherited, Hypersensitive Resistance

Recent concern about survival and recovery of highelevation white pine ecosystems has returned white pine blister rust (caused by Cronartium ribicola) to prominence as a significant threat to forest health in the western U.S. (Samman et al., 2003). This, in turn, has spurred new research into potential rustresistance mechanisms in high-elevation white pines, including whitebark (Pinus albicauli...