Author: Publisher:
ISBN:
Category : Fungal diseases of plants
Languages : en
Pages : 40
Book Description
Laminated Root Rot in Western North America
Author: Publisher:
ISBN:
Category : Fungal diseases of plants
Languages : en
Pages : 40
Book Description
Laminated Root Rot in Western North America
Author: Walter G. ThiesPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Laminated root-rot, caused by the fungus Phellinus weirii, is a serious root disease affecting Douglas fir and other commercially important species of conifers in north-western North America. This report provides an overview of the disease as it occurs in the Pacific Northwest of the US and Canada. Information is presented on recognizing crown symptoms and signs of the disease. The disease cycle of laminated root-rot from initiation to intensification and distribution within infected stands is also described. Finally, disease management strategies during stand development and at stand regeneration are discussed. Features on the nomenclature of the fungus and on its management by silvicultural and mechanical approaches are included.
Laminated Root Rot
Author: James S. HadfieldPublisher:
ISBN:
Category : Phellinus weirii
Languages : en
Pages : 20
Book Description
Laminated Root Rot in a Western Washington Plantation
Author: Richard E. MillerPublisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 48
Book Description
A 4-year-old Douglas-fir plantation in the western Washington Cascades was monitored for 8 years after fertilization with potassium (K), nitrogen (N), and K+N to determine fertilizer effects on rates of mortality from laminated root rot (LRR) and other causes relative to a nonfertilized control. Each element was applied at a rate of 300 lb/acre on and around 0.2-acre plots replicated seven times in a randomized complete block design. Cumulative mortality from LRR did not differ significantly among fertilizer treatments, and losses were strongly related to density of infected stumps from the previous stand (r2 = 0.74). Mortality from disease and other sources accelerated during the 8 years of monitoring. Average tree growth and stand volume were greatest in treatment N and were reduced where N was combined with K. Continued monitoring is needed to identify potential longer term effects of the fertilizer treatments on susceptibility of Douglas-fir to LRR and Armillaria spp.
Laminated Root Rot in a Western Washington Plantation :.
Author: Richard E. MillerUser's Guide to the Western Root Disease Model, Version 3.0
Author: Root Diseases in Coniferous Forests of the Inland West
Author: Publisher:
ISBN:
Category : Roots (Botany)
Languages : en
Pages : 40
Book Description
After nearly 100 years of fire exclusion, introduced pests, and selective harvesting, a change in forest composition has occurred in many Inland West forests of North America. This change in forest structure has frequently been accompanied by increases in root diseases and/or an unprecedented buildup of fuels. Consequently, many forest managers are implementing plans for fuels treatments to lower the risk of severe wildfires. Impacts on root disease should be considered before selecting appropriate fuels treatments. Complex interactions exist among conifer root diseases, fuels treatments, forest structure, species composition, stand history, and other environmental factors. As forest managers prescribe fuels treatments, their success in lowering the risk of severe wildfire will depend in part on the impacts of these treatments on root disease. Root diseases are one of many factors to be considered when developing plans for fuels treatments. Choices must be made on a site-by-site basis, with knowledge of the diseases that are present. This paper provides examples of how fuels treatments may increase or reduce specific diseases and demonstrates their importance as considerations in the fuels management planning process. Several root diseases prevalent within Inland West of North America are addressed: Armillaria root disease, annosus root disease, laminated root rot, black stain root disease, Schweinitzii root and butt rot, Tomentosus root disease, Rhizina root rot, and stringy butt rot. For each disease, general information is provided on disease identification, management options, and potential effects of fuels treatments. However, many long-term studies are needed to assess effects of specific interactions among fuels treatments, root diseases, and host trees.
Root Diseases in Coniferous Forests of the Inland West
Author: Laminated Root Rot in a Western Washington Plantation
Author: United States Department of AgriculturePublisher: CreateSpace
ISBN: 9781508798118
Category :
Languages : en
Pages : 44
Book Description
A 4-year-old Douglas-fir plantation in the western Washington Cascades was monitored for 8 years after fertilization with potassium (K), nitrogen (N), and K+N to determine fertilizer effects on rates of mortality from laminated root rot (LRR) and other causes relative to a nonfertilized control. Each element was applied at a rate of 300 lb/acre on and around 0.2-acre plots replicated seven times in a randomized complete block design. Cumulative mortality from LRR did not differ significantly among fertilizer treatments, and losses were strongly related to density of infected stumps from the previous stand (r2 = 0.74). Mortality from disease and other sources accelerated during the 8 years of monitoring. Average tree growth and stand volume were greatest in treatment N and were reduced where N was combined with K. Continued monitoring is needed to identify potential longer term effects of the fertilizer treatments on susceptibility of Douglas-fir to LRR and Armillaria spp.
Phellinus (poria) Weirii Root Rot
Author: Canadian Forestry ServicePublisher: Pacific Forest Research Centre
ISBN:
Category : Douglas fir
Languages : en
Pages : 24
Book Description