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AMERICAN FORESTRY 



Courtesy of W . S. Carpenter, New York Conservation Commission 



BLISTER RUST ATTACKS TREES OF ANY SIZE 



Fourteen branches infected with blister rust were found on this tree, of which eleven are shown in the photograph. The tree is 35 feet tall, 

 8 inches in diameter at breast height. The largest branch girdled by the disease is 3'/, inches in diameter at the point attacked. The cur- 

 rant which apparently caused the infection on this tree grew about 300 feet distant. 



