Origin
The causal agent, Ceratocystis fagacearum, is found only within the borders of the United States, but the origin of the pathogen is not known. Recent evidence suggests that the pathogen was introduced into the United States, possibly from Central or South America, or Mexico. The disease currently affects much of the eastern and central US, from Virginia to Minnesota to Arkansas, with pockets of infection as far southwestward as Austin, Texas. One area of infection has recently been discovered as far northeastward as Glenville, New York. It is particularly common in the .
Read more about this topic: Oak Wilt
Famous quotes containing the word origin:
“We have got rid of the fetish of the divine right of kings, and that slavery is of divine origin and authority. But the divine right of property has taken its place. The tendency plainly is towards ... “a government of the rich, by the rich, and for the rich.””
—Rutherford Birchard Hayes (1822–1893)
“Each structure and institution here was so primitive that you could at once refer it to its source; but our buildings commonly suggest neither their origin nor their purpose.”
—Henry David Thoreau (1817–1862)
“In the woods in a winter afternoon one will see as readily the origin of the stained glass window, with which Gothic cathedrals are adorned, in the colors of the western sky seen through the bare and crossing branches of the forest.”
—Ralph Waldo Emerson (1803–1882)