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Probing Question: What causes trees to be diseased?

Posted: April 13, 2012

From the delicate cherry blossoms of Washington, D.C. to the towering redwoods of northern California, many towns and institutions across the nation are known and loved for their iconic trees. Count the majestic elms of Penn State's University Park campus among these beloved arboreal symbols—but if you literally count them, you'll notice there are fewer today than ever.
Credit: Penn State --- Elms along Pugh Street Mall on Penn State's University Park campus. -- June 23, 2011

Credit: Penn State --- Elms along Pugh Street Mall on Penn State's University Park campus. -- June 23, 2011

See story on Penn State LIVE -- http://live.psu.edu/story/59157#nw63