Distribution
Originally thought to be native to North America, the PWN has now spread overseas to countries such as Japan, China, Vietnam, and Portugal, where it has caused severe damage in certain species of pine. Perhaps the most notable PWN epidemic has occurred in Japan, where pine wilt is credited with the destruction of some 26 million cubic meters of timber since WWII.
Pine wilt, as a disease, was first identified in Japan in 1905. Recent research has now indicated it may have originated from Japan and Asia.and been transferred via shipping. It was found in the United States in Missouri in 1931. PWN was identified as the pathogen responsible for pine wilt in 1979.
Read more about this topic: Bursaphelenchus Xylophilus
Famous quotes containing the word distribution:
“In this distribution of functions, the scholar is the delegated intellect. In the right state, he is, Man Thinking. In the degenerate state, when the victim of society, he tends to become a mere thinker, or, still worse, the parrot of other men’s thinking.”
—Ralph Waldo Emerson (1803–1882)
“Classical and romantic: private language of a family quarrel, a dead dispute over the distribution of emphasis between man and nature.”
—Cyril Connolly (1903–1974)
“My topic for Army reunions ... this summer: How to prepare for war in time of peace. Not by fortifications, by navies, or by standing armies. But by policies which will add to the happiness and the comfort of all our people and which will tend to the distribution of intelligence [and] wealth equally among all. Our strength is a contented and intelligent community.”
—Rutherford Birchard Hayes (1822–1893)