50 



Mycologia 



Stakman, E. C, Parker, J. H., & Piemeisel, F. J. Can biologic 

 forms of stem-rust on wheat change rapidly enough to inter- 

 fere with breeding for rust resistance? Jour. Agr. Research 

 14: 111-124. pL 13-17. 8 Je 1918. 



Stewart, V. B. Exclusion legislation and fruit tree production. 

 Phytopathology 8: 360-364. 17 Jl 1918. 



Stevenson, J. A. Citrus diseases of Porto Rico. Jour. Dept. 



Agr. Porto Rico 2 : 43-123. Ap 1918. 

 Stone, R. E. Incubation period of Cronartium rihicola on the 



white pine. Phytopathology 8 : 438-440. Au 1918. 



Tanaka, T. Notes on some fungous diseases and a new coddling 

 moth attacking the persimmon in Japan. Month. Bull. State 

 Comm. Hort. Calif. 7 : 461-463. Jl 1918. 



Van Pelt, W. Some important clover diseases in Ohio. Month. 

 Bull. Ohio Agr. Exp. Sta. 3 : 239-243. /. i, 2. Au 1918. 



Weir, J. R., & Hubert, E. E. Cultures with Melampsorae on 

 Popuhis. Mycologia 8: 194-198. Jl 1918. 



Zeller, S. M. An interesting fungus from Friday Harbor, Wash- 

 ington. Publ. Puget Sound Biol. Sta. 2 : 95, 96. i Jl 1918. 



Rhizopogon diplophloeus. 



