What are the main causes of tree disease?

Beattie-Moss, Melissa
April 2012
Western Farm Press Exclusive Insight;4/20/2012, p7
The article offers information on diseases threatening trees in the U.S. including cherry blossoms, redwoods and elms. One of them is elm yellows, a disease that poses threat to the health of over 200 American elms on the campus of Penn State University. Another is bacterial leaf scorch which is damaging trees in the Northeast.


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