196 HARUYOSHI SAHO 



Table 3. Relative susceptibility of native and introduced 

 Japanese white pines to Coleosporiwn needle rusts 



Relative susceptibility to five 

 Coleosporiian spe cies 



Needle rusts 



£ 









o 



C3 







o 



-c 



jC 



?H 



o 



X 



oj 



E- 



3 



■s 



03 

 CO 



CO 



g; 



■t-j 



CO 





CO 





fn 





CO 



V 



-^ 



<C 



0) 



•^ 



K 



« 





a 



+i 



O 



<3i 



•^ 



v 



V 



V 



3 



•^> 



*<* 



CO 



CO 



<K 



Sh 



« 



<3 



<» 



•^ 



O 



o 



+i 



K 



O 



4^ 



« 



0) 



ca 





« 



o 



a, 



CO 



s 



CU 



o 



o 



o 



•v^ 



s 



<» 



0) 



<U 



o 



ca 



g 



K 



K 



•^ 3 <U *tt *u £ 



White pine species o ca s e s 



Native 



P. koraiensis 



P. pentaphyila 



P. pumila 



Foreign : 



P. cembra 



P. griffithii 



P. monticola 



P. peuce Griseb. 



P. strobus 



Plus or minus susceptibility rankings have the following meaning: 

 - = no peridennia (aecia) were found on needles (i.e., the thie pine host 

 was resistant) ; + = few peridermia were found on needles (pine host 

 moderately resistant) ; ++ = peridermia were recognized easily (pine host 

 susceptible); and +++ = many peridermia were found on needles (pine host 

 highly susceptible.) 



LITERATURE CITED 



Critchfield, W. B. and E. L. Little, Jr. 1966. Geographic distribution 



of the pines of the world. U.S. Dep. Agric. , Forest Serv., Misc. 



Publ. 991, 97 p. 

 Hayashi, Y. 1960. "Taxonomical and phytogeographical study of Japanese 



conifers." Norin Shuppan, Tokyo, 202 p. (In Japanese) 

 Imazeki, R. 1963. Asia, p. 3-5. In Internationally dangerous forest 



tree diseases (IUFR0 Working Group in International Cooperation in 



Forest Disease Research report). U.S. Dept . Agric, Forest Serv. 



Misc. Publ. 939, 122 p. 

 Kamei, S. and T. IgaraslA. 1963. "Study on white pine blister rust in 



Hokkaido." Proc. For. Soc. Japan, Hokkaido Branch, 12: 100-102. (In 



Japanese) . 

 Kamei, S., T. Igarashi, H. Saho, et at. 1958. "Report of investigation of 



white pine blister rust fungi in Hokkaido." Cooperative Group Mimeo 



Report. 20 p. (In Japanese) 



