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:
“Our theism is the purification of the human mind. Man can paint, or make, or think nothing but man. He believes that the great material elements had their origin from his thought.”
—Ralph Waldo Emerson (1803–1882)
“All good poetry is the spontaneous overflow of powerful feelings: it takes its origin from emotion recollected in tranquillity.”
—William Wordsworth (1770–1850)
“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)