plantations. In 1928, Boyce (4) discovered the disease in eastern 

 Massachusetts, and in 1949 Weiss (67) reported it in Massachusetts, 

 New York, and Rhode Island. Stambaugh and Bramble (56) re- 

 ported the disease in Pennsylvania in 1952. 



How the fungus first became established in plantations in New 

 England is unknown (5). Baxter (1) states that the fungus occurs on 

 ornamental Douglas-fir in the Northeast. Boyce (5) believes that the 

 fungus was introduced into the eastern United States from the west 

 coast on transplant nursery stock. Stambaugh and Bramble (56) 

 believe R. pseudotsugae in Pennsylvania originated from the ship- 

 ment of diseased Douglas-fir nursery stock from Colorado to Susque- 

 hanna County in the northern part of the state. 



The disease is now found in Douglas-fir plantations throughout 

 eastern and central New York. The earliest known record of the 

 disease in the state was that of an outbreak on Long Island in the 

 late 1930's reported by Dr. Donald Welch of Cornell University, 

 Ithaca, New York. 



Infected plantations at Camden, Cortland, and Cheningo, New 

 York, all within a 50-mile radius of Syracuse, were used as experi- 

 mental areas in the present study. 



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