Keyword: Armillaria

Phylogeography and host range of Armillaria gallica in riparian forests of the northern Great Plains, USA

Root disease pathogens, including Armillaria, are a leading cause of growth loss and tree mortality in forest ecosystems of North America. Armillaria spp. have a wide host range and can cause significant reductions in tree growth that may lead to mortality. DNA sequence comparisons and phylogenetic studies have allowed a better understanding of Armillaria spp. taxonomic diversity.

Phylogenetics and host distribution of Armillaria in riparian ecosystems of the northern Great Plains

Root disease pathogens, including Armillaria (Fr.) Staude, are a leading cause of growth loss and mortality of trees in forest ecosystems of North America (Lockman & Kearns 2016). This panglobal fungus can cause significant reductions in tree growth that can lead to mortality. Armillaria spp.

Bioclimatic modeling of Armillaria species in southeastern Alaska, including potentially invasive Armillaria species under changing climate

Armillaria root disease, caused by several Armillaria species, is one of most damaging tree diseases throughout the world (Wargo & Shaw 1985). In southeastern Alaska, both A. sinapina and A. nabsnona have previously been reported, but these species have generally been considered as weak pathogens or saprophytes under natural conditions in this region (Shaw & Loopstra 1988, Adams et al. 2015). More recently, however, A.

Assessing potential Armillaria spp. distributions in western Oregon, western Washington, and Alaska

Armillaria species are key components of forest ecosystems throughout most regions of western North America. Their ecological roles range from beneficial saprobes to damaging root pathogens, and their impacts vary with environment and host.

Re-evaluation of Armillaria and Desarmillaria in South Korea based on ITS/tef1 sequences and morphological characteristics

Fungal species in the genera Armillaria and Desarmillaria (Physalacriaceae, Agaricales) are well known for their symbiotic relationships with Gastrodia elata and Polyporus umbellatus, important components of traditional medicine in Asia. In addition, some species in these genera cause Armillaria root disease, which has had a negative economic impact by damaging and destroying urban, horticultural and forest trees.

Insights into the phylogeny of Northern Hemisphere Armillaria: Neighbor-net and Bayesian analyses of translation elongation factor 1-α gene sequences

Armillaria possesses several intriguing characteristics that have inspired wide interest in understanding phylogenetic relationships within and among species of this genus. Nuclear ribosomal DNA sequence–based analyses of Armillaria provide only limited information for phylogenetic studies among widely divergent taxa.

Invasive Species Science Update (No. 7)

Invasive Species Science Updates are designed to keep managers and other users up-to-date with recently completed and ongoing research by RMRS scientists, as well as highlight breaking news related to invasive species issues.

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

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).

An integrated taxonomic approach to survey Armillaria in Iran

Iran's most valuable forests are located on the coast of the Caspian Sea and cover 1.85 million ha in the northern region of the Alborz mountain range, which is the highest mountain range in the Middle East. Dense forests cover two major provinces, Gilan and Mazandaran; however, less than 10% of Iran is forested. These forests comprise temperate, deciduous, broad-leaved tree species .

Forest root diseases across the United States

The increasing importance and impacts of root diseases on the forested ecosystems across the United States are documented in this report. Root diseases have long-term impacts on the ecosystems where they reside due to their persistence onsite. As a group of agents, they are a primary contributor to overall risk of growth loss and mortality of trees in the lower 48 States.