Today, Shaw and his colleague, Dr. Brian Geils of the Rocky Mountain Research Station are now the senior scientists. Together, they have compiled a collection of 12 journal article on the biology and management of Cronartium ribicola, an introduced invasive pathogen that causes white pine blister rust, a seriously damaging disease of North American white pines.
The August 2010 journal issue provides a synthesis of knowledge on C. ribicola, identifies policy and management actions to mitigate disease impacts, and reviews future issues facing white pine management such as climate change and new pathogen introductions. Through this comprehensive and scholarly review of the literature, Shaw, Geils, and thirty-three contributing authors provide a scientific basis for protecting and sustaining white pine ecosystems.
"The rust pathogen has a very complicated life cycle," explains Shaw, "with five different spore stages alternating between two different hosts." The disease produces stem cankers that can eventually girdle and kill susceptible host pines; spores that can only infect Ribes (currants and gooseberries) are produced on infected trees. The fungus intensifies on Ribes leaves and may cause early defoliation; but more importantly wind-born spores spread the rust back to nearby white pines. Until the 1960s, managers exploited this requirement in the rust's life cycle to control the disease by poisoning or grubbing out Ribes bushes from farms and forests. Although Ribes eradication reduced losses in some stands and provided needed employment during the Depression, the practice was unreliable, expensive, and could be environmentally damaging. Continued research discussed in the special issue has led to silvicultural and genetic practices that are used today and could be adapted for managing future populations of white pines for their economic and ecological values.
The western white pine is an evergreen tree capable of rapid growth to great size with desirable wood properties. This pine and the similar sugar pine were once important timber trees, but logging, other disturbances, and loss of regeneration led to a marked decline in supply.
The release of the publication compiled by Shaw and Geils coincides with the centennial of the introduction of the pathogen to Western North America as well as the Great Fire of 1910, often called the largest fire in American history. This fire burned over 3 million forest acres in northern Idaho and western Montana and killed 86 people. The area it burned was about the size of the state of Connecticut and the forests were said to be so dense that a person had to cut a way through. Also consumed in this fire were acres and acres of western white pine. After the destruction, the white pine readily regenerated, along with the Ribes which set up a perfect condition for the newly introduced Cronartium ribicola to kill millions of young pines.
In higher elevations of the mountainous West where white bark pine grows, white pine blister rust and bark beetles have so devastated some populations that the Department of the Interior is now reviewing a petition to list the species as threatened or endangered. This special issue of Forest Pathology contains considerable scientific information that may be of significant value as the agency evaluates the status of this tree species.
Shaw, Geils and their colleagues hope this edition of Forest Pathology (volume 40, issue 3-4, 145-418, August 2010) will inform and increase discussion and solutions to managing and eventually controlling the spread of this disease on white pines.
To read the abstract and order a copy of the journal please visit http://onlinelibrary.wiley.com/doi/10.1111/efp.2010.40.issue-3-4/issuetoc.
Sherri Richardson Dodge | EurekAlert!
Six-legged livestock -- sustainable food production
11.05.2017 | Faculty of Science - University of Copenhagen
Elephant Herpes: Super-Shedders Endanger Young Animals
04.05.2017 | Universität Zürich
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.
In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
24.05.2017 | Physics and Astronomy
24.05.2017 | Physics and Astronomy
24.05.2017 | Event News