Nootkatone can be extracted in minute quantities from the skin of grapefruit or the bark of the Alaska yellow cedar
(also known as the Nootka cypress), or produced in a sustainable, industrial scale process via yeast fermentation that provides a reliable, safe supply.
The Rogue region alone boasts more than 30 types of coniferous trees, including temperate rain-forest species like spruce and hemlock, and dry-forest types such as ponderosa pine and juniper, as well as stands of coast redwoods, Alaskan yellow cedar
, and the endangered Port Orford cedar.
Above ground, yellow cedar
(Callitropsis nootkatensis) and western red cedar (Thuja plicata) were the most consistently durable at all four test sites.
There was this big slab of yellow cedar
he had set aside in the yard," said Chip.
Her wood-chip ruff Tongass Yellow Cedar
celebrates a tree logged for decades in our nation's largest national forest, but now frost-killed from lack of snow cover during winter months.
When termites were given no choice but to consume just one variety of wood for 6 weeks, six of the woods--redwood, Brazilian jatoba, Peruvian walnut, Honduran mahogany, Alaska yellow cedar
, and teak--showed some level of natural resistance and caused an average of better than 75 percent termite mortality.
SILVA Timber Products has expanded its range with a landmark deal to import yellow cedar
from British Columbia in Canada.
Above: The Halls consider the 20- by 80-foot yellow cedar
deck an adjunct living space.
While nootkatone, a bioactive natural component of Alaskan yellow cedar
oil, has been shown to kill ticks in high numbers, it is quite expensive to produce, according to Thomas Mather, a University of Rhode Island professor and tick expert who runs www.
Both stations were in forest dominated by Mountain Hemlock (Tsuga mertensiana) with scattered Yellow Cedar
(Chamaecyparis nootkatensis) and Amabilis Fir (Abies amabliis).
The Tongass also produces prized wood: yellow cedar
, western red cedar, western hemlock, and lastly, Sitka spruce, commonly used for lumber but also a strong and lightweight material that, in the era before aluminum, was used in airplane construction.
It has bags of charm,including cornicing and yellow cedar