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Keyword: white pine blister rust

Can scents of high-elevation pines make sense of insect and disease resistance?

Science Spotlights Posted on: August 25, 2020
Pine trees emit characteristic and strong odors from their foliage. While aesthetically pleasing to humans, these volatile organic compounds serve many functions, including defense against insects and pathogens. We compared the odors from foliage of eight species of high-elevation five-needle pines in Europe and North America that vary in resistance to the mountain pine beetle and white pine blister rust and identified the most important compounds for classifying resistant and susceptible species.

Whitebark pine encroachment into lower-elevation sagebrush grasslands in southwest Montana, USA

Publications Posted on: August 10, 2020
Projections for the future health and abundance of whitebark pine (Pinus albicaulis Engelm.) populations in western North America are dire. Not only has the species been declining due to the combined effects of fire exclusion policies, mountain pine beetle (Dendroctonus ponderosae Hopkins 1902) outbreaks, and white pine blister rust (Cronartium ribicola J.C.

“It’s all up from here”: Forest openings and seedling growth in western white pine restoration

Documents and Media Posted on: July 27, 2020
Over a decade of research by Rocky Mountain Research Station scientists Terrie Jain and Russell Graham is now providing updated guidelines for regenerating and establishing white pine on the landscape by focusing on factors such as forest openings and visible sky. Document Type: Other Documents

Management of high-elevation five-needle white pines

Science Spotlights Posted on: April 16, 2020
White pine blister rust (WPBR), a disease caused by the fungal pathogen Cronartium ribicola, has spread rapidly through moist forests in the northwestern and eastern United States, killing many five-needle white pines, a crucial subalpine forest species. WPBR continues to spread more slowly through the drier habitats of the southern Rockies, Great Basin, and Southwest. RMRS scientists, in collaboration with other researchers and forest managers, have developed the regeneration for resilience (R4R) framework, which prioritizes limited resources and utilizes natural and artificial regeneration for management of stands and landscapes to support multi-generational, self-sustaining pine populations in the presence of WPBR. 

Characterization of Cronartium ribicola dsRNAs reveals novel members of the family Totiviridae and viral association with fungal virulence

Publications Posted on: February 18, 2020
Background: Mycoviruses were recently discovered in the white pine blister rust (WPBR) fungus Cronartium ribicola (J.C. Fisch.). Detection and characterization of their double stranded RNA (dsRNA) would facilitate understanding of pathogen virulence and disease pathogenesis in WPBR systems. Methods: Full-length cDNAs were cloned from the dsRNAs purified from viral-infected C.

Back from the brink: Framework to sustain resilience to species at risk

Science Spotlights Posted on: August 14, 2019
The Regeneration for Resilience (R4R) framework provides a decision structure to prioritize limited resources and utilize seedling planting and natural regeneration management to offer the best likelihood of success in positioning stands and landscapes to support resilience self-sustaining tree populations that are threatened by invasive pests. Effective management of forest regeneration dynamics can increase forest resilience and adaptive capacity to mitigate impacts of invasive species.

Invasive Species Science Update (No. 11)

Publications Posted on: June 10, 2019
In this issue, we cover new research ranging from using chili powder to improve native plant restoration, searching for a link between exotic white pine blister rust and mountain pine beetle resistance in limber pine, identifying how melting arctic sea ice could open new pathways for invasive species introductions, and research into a relatively newly established biocontrol agent for rush skeletonweed.

Limber pine (Pinus flexilis James) genetic map constructed by exome-seq provides insight into the evolution of disease resistance and a genomic resource for genomics-based breeding

Publications Posted on: May 16, 2019
Limber pine (Pinus flexilis) is a keystone species of high-elevation forest ecosystems of western North America, but some parts of the geographic range have high infection and mortality from the non-native white pine blister rust caused by Cronartium ribicola. Genetic maps can provide essential knowledge for understanding genetic disease resistance as well as local adaptation to changing climates.

Proactive limber pine conservation strategy for the Greater Rocky Mountain National Park Area

Publications Posted on: February 22, 2019
This proactive conservation strategy addresses the unique situation of limber pine in the Greater Rocky Mountain National Park Area (GRMNPA). The target area includes Rocky Mountain National Park and surrounding areas of northern Colorado and southern Wyoming.

Is it southwestern white pine (Pinus strobiformis), limber pine (P. flexilis), or a hybrid?

Projects Posted on: October 05, 2018
Both southwestern white pine and limber pine are threatened by the non-native pathogen Cronartium ribicola that causes the lethal disease white pine blister rust. Identifying genetic resistance to white pine blister rust in the pines and planting seedlings with those resistance traits are critical components of proactive and restoration strategies to conserve and sustain the species.