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Keyword: root disease

Root disease can rival fire and harvest in reducing forest carbon storage

Publications Posted on: September 27, 2017
Root diseases are known to suppress forest regeneration and reduce growth rates, and they may become more common as susceptible tree species become maladapted in parts of their historic ranges due to climate change.

First report of Fusarium proliferatum causing Fusarium root disease on sugar pine (Pinus lambertiana) in a forest container nursery in California

Publications Posted on: January 05, 2017
Fusarium species, specifically F. commune, F. proliferatum, and F. solani, can cause severe damping-off and root disease in container and bareroot forest nurseries throughout North America. Many conifer and hardwood species can be affected, but Douglas-fir (Pseudotsuga menziesii), western white pine (Pinus monticola), and ponderosa pine (P. ponderosa) are known to be susceptible to Fusarium root disease (Stewart et al. 2012).

Root disease quietly holds back forest carbon storage

Science Spotlights Posted on: September 13, 2016
Growing forests take greenhouse gases such as carbon dioxide out of the atmosphere. National forests must account for how natural and management-oriented disturbance processes affect carbon storage as an ecosystem benefit.  Although it doesn’t always cause large, eye-catching areas of mortality, root disease likely affects carbon storage by reducing tree growth and regeneration over vast areas.  However, no previously available tools allowed monitoring of the effect of root disease on carbon storage at a landscape level.

Can metagenetic studies of soil microbial communities provide insights toward developing novel management approaches for Armillaria root disease?

Publications Posted on: June 23, 2016
Armillaria root diseases are among the most damaging and broadly distributed group of forest diseases in the world (Lockman et al. in press). Armillaria root disease is typically more severe in highly susceptible tree species and in trees that are maladapted due to rapidly changing climatic conditions (Ayres and Lombardero 2000, Kliejunas et al. 2009, Sturrock et al. 2011).

Survey for Armillaria by plant associations in northern Arizona

Publications Posted on: August 12, 2015
Fungi in the genus Armillaria are associated with an important disease of deciduous and coniferous trees and shrubs in western North America. This study examined the distribution of Armillaria by forest habitat types on the Kaibab National Forest and northern Coconino National Forest, Arizona. Over 400 trees were examined for Armillaria in 76 Interior West Forest Inventory and Analysis permanent plots representing 17 different habitat types.

Fusarium oxysporum protects Douglas-fir (Pseudotsuga menziesii) seedlings from root disease caused by Fusarium commune

Publications Posted on: September 27, 2012
Fusarium root disease can be a serious problem in forest and conservation nurseries in the western United States. Fusarium inoculum is commonly found in most container and bareroot nurseries on healthy and diseased seedlings, in nursery soils, and on conifer seeds. Fusarium spp. within the F.

Effect of organic amendments on Douglas-fir transplants grown in fumigated versus non-fumigated soil

Publications Posted on: April 08, 2011
We transplanted one-year old Douglas-fir (Pseudotsuga menziesii var. menziesii) seedlings into compost-amended soil that had either been spring-fumigated with a methyl bromide/chloropicrin combination or left unfumigated. Seedling nutrient, pathology, morphology, and packout measurements were significantly better for those transplanted into fumigated rather than non-fumigated soil, regardless of compost treatment.

Characteristics of endemic-level mountain pine beetle populations in south-central Wyoming

Publications Posted on: January 14, 2010
This study was conducted to evaluate the dynamics of endemic populations of mountain pine beetle (Dendroctonus ponderosae Hopkins). In addition, we extended the geographical range of an existing data base recorded in Utah with similar data from Wyoming. This work was accomplished in lodgepole pine (Pinus contorta Dougl. Var. latifolia Engelm.) stands on the Medicine Bow National Forest in south-central Wyoming.

Volcanic Ash Soils: Sustainable Soil Management Practices, With Examples of Harvest Effects and Root Disease Trends

Publications Posted on: February 20, 2007
Sustainability protocols recognize forest soil disturbance as an important issue at national and international levels. At regional levels continual monitoring and testing of standards, practices, and effects are necessary for successful implementation of sustainable soil management. Volcanic ash-cap soils are affected by soil disturbance and changes to soil properties influence ecosystem responses such as productivity and hydrologic function.