278 R. T. BINGHAM 



LITERATURE CITED 



Bedwell, J. L. and Thomas W. Childs. 1943. Susceptibility of white-bark 



pine to blister rust in the Pacific Northwest. J. Forest. 41: 904- 



912. 

 Bingham, R. T., R. J. Hoff, and R. J. Steinhoff. In press. Genetics of 



western white pine. 

 Childs, Thomas W. and J. L. Bedwell. 1948. Susceptibility of some white 



pine species to Cronartium ribioola in the Pacific Northwest. J. 



Forest. 46: 595-599. 

 Clinton, G. P. 1919. Artificial infection of Ribes species and white 



pine with Cronartium ribioola. Amer. Plant Pest Comm. (Ed. 2) Bull. 



2: 14-15. 

 Clinton, G. P. and F. A. McCormick. 1919. Artificial infection of pines 



with Cronartium ribioola. Amer. Plant Pest Comm. Bull. 4: 12. 

 Critchfield, William B., and Elbert L. Little, Jr. 1966. Geographic 



distribution of the pines of the world. U.S. Dep. Agr . , Forest 



Service, Misc. Publ. 991, 97 pp. 

 Hirt , R. R. 1940. Relative susceptibility to Cronartium ribioola of 



5-needled pines planted in the east. J. Forest. 38: 932-937. 

 Meyer, H. 1954. Zur Blasenrost-Resistenzztlchtung mit Pinus strobus . 



Ztschr. f. Forstgenetik. u. Forstpf lanzenztlch . 3: 101-104. 

 Mirov, N. T. 1967. The genus Vinus . Ronald Press, New York. 602 pp. 

 Moir, W. S. 1924. White pine blister rust in western Europe. U.S. 



Dep. Agr. Bull. 1186. 32 pp. 

 Pennington, L. H., W. H. Snell, H. H. York, and Perley Spaulding. 1921. 



Investigations of Cronartium ribioola in 1920. Phytopathology 11: 



170-172. 

 Spaulding, Perley. 1922. Investigations of the white pine blister rust. 



U.S. Dep. Agr. Bull. (Prof. Paper) 957: 100 pp. 

 Spaulding, Perley. 1925. A partial explanation of the relative suscep- 

 tibility of the white pines to the white pine blister rust {Cronartium 



ribioola Fischer). Phytopathology 15: 591-597. 

 Spaulding, Perley. 1929. White-pine blister rust: a comparison of 



European with North American conditions. U.S. Dep. Agr. Tech. Bull. 



87, 58 pp. 

 Tubeuf, C. von. 1897. Uber die Verbreitung von Pf lanzenkrankheiten . 



Forstl. Natuw. Ztschr... 6: 320-325, 339-340. 

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Cronartium. II. Studien Uber die Infection der Weymouthskiefer . 



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analysis of pathogenicity. Neth. J. Plant Path. 75: 45-52. 



FLOOR DISCUSSION 



Moderator Bingham withheld floor discussion on the previous, closely 

 related paper by Dr. Heimburger so both papers could be discussed 

 together, here. 



GERHOLD: Mr. Bingham, would you like to comment on the correlation 

 between blister rust infection in nursery tests and infection that you 

 find after field exposure? 



BINGHAM: Our information on this point is only now beginning to 

 come in. Because I know Dr. Ronald Dinus will be presenting much more 

 conclusive data on this point, with fusiform rust, tomorrow, I would 



