252 B. K. BAKSHI 



NATIVE ASIAN WHITE PINES 



PINUS ARMANDII 



Indigenous in central China, Burma, Taiwan, Hainan Tao, and in 

 North East Frontier Agency, India. 



This species is known to be highly resistant to blister rust infec 

 tion in its native home and also where introduced into Canada, France, 

 and United States (Buchanan, 1964). P. armandii has been successfully 

 inoculated with C. vibicola in the U.S. (Bingham, these proceedings). 



PINUS SIBIRICA 



Indigenous in the U.S.S.R. (Central Siberia, N. China, and North 

 Mongolia. 



The blister rust is recorded on this pine in Russia, and it appears 

 to be moderately susceptible in the U.S.S.R. (Spaudling, 1929). 



PINUS PUMILA 



Indigenous in northwestern Asia, extending north almost to the Arctic 

 Ocean, east to the Bering Sea, west to northern Mongolia and Lake Baikal, 

 south to Korea and Central Honshu, Japan. 



P. pumila appears to be moderately resistant (Spaulding, 1929), and 

 C. vibicola appears to be absent on it in Korea. 1 



PINUS WALLICHIANA 



Indigenous in temperate regions throughout the Himalayas from 

 Afghanistan to north Burma. C. vibicola is recorded on this pine in 

 western Himalayas only, though sporadically. Forty-year-old sample 

 stock of P. walliohiana in Korea has remained free from infection of 

 blister rust. 1 The species was found to be resistant in different loca- 

 tions in Europe where Pinus stvobus was attacked (Spaulding, 1929) , and 

 although it was artificially inoculated it proved to be fairly resistant 

 in North America (Bingham, 1967; Heimburger, 1962). 



PINUS KORAIENSIS 



Indigenous in north eastern Asia from south Siberia through Manchuri; 

 to Korea and central Japan. 



This species is attacked by C. vibicola in Korea. Dr. S. K. Hyun 1 

 reports that there was a record of blister rust infection in 1936 in an 

 8-year-old plantation of this pine in Kyunggido Province, Korea, but no 

 significant damage on the host was observed. In 1967 the rust was 

 reported from Kangwondo Province, Korea, in 60 ha of 7 to 11-year-old 

 plantations. About 60 percent of the trees were infected and 30 percent 

 were severely damaged, resulting in a few dead trees. However, Ribes 



^■Dv. S. K. Hyun, personal communication, 1969. 



