(110) 



Rhoads, A. S. a. o. Host relationships of the North American rusts, other than 



gymnosporangiums, which attack conifers. (Ibidem p. 309 — 352.) 

 Ridgway, C. S. Methods for the differentiation of pathogenic fungi in the tissues of 



the host. (Phytopathology VII [1917], p. 389—391.) 

 Roberts, J. W. The sources of apple bitter-rot infections. (Bull. U. S. Departm. 



Agric. Nr. 684 [1918], 25 pp., 5 Pis.) 

 Rogers, J. M. and Earle, F. S. A simple and effective method of protecting citrus 



fruits against stemend rot. (Phytopathology VII [1917], p. 361 — 367.) 

 Rorer, J. B. Algal disease of cacao. (Proceed. Agric. Soc. Trinidad and Tobago XVII 



[1917], p. 345—348.) 

 Rosenbaum, J. and Ramsey, G. B. Influence of temperature and precipitation on the 



blackleg of potato. (Journ. Agric. Research Washington XIII [1918], p. 507 — 513, 



1 Fig.) 

 Salmon, E. S. On forms of the Hop (Humulus lupulus L.) resistant to mildew (Sphaero- 



theca humuli [DC] Burr.). (Journ. Agric. Sci. VIII [1917], p. 455—460.) 

 Sawada, K. A new rust-fungus parasitic on the cultivated rose. (Transact. Sapporo 



nat. Hist. Soc. VII [1918], p. 36—40, ill. — Japanese.) 

 Schander, R. Beobachtungen und Versuche iiber Kartoffeln und Kartoffelkrank- 



heiten im Sommer 1917. (Fiihlings landw. Zeitg. LXVII [1918], p. 204—226.) 

 Scheidter, Franz. Das Tannensterben im Frankenwalde. (Naturwiss. Zeitschr. 1 



Forst- u. Landwirtsch. XVII [1919], p. 69—90.) 

 Schilberszky, K. Antrag in Bezug auf den Getreideschwarzrost. ( Javaslat a fekete 



gabonarozsda targyaban.) (Bot. Kozlem. XVII [1918], p. 43—48.) 

 Schmidt, H. Biologische Bemerkungen zur Massalongia rubra-Galle an Betula. (Soc. 



entomol. XXXIII [1918], p. 35.) 



— Xeue Kafergallen aus der Umgebung von Griinberg in Schlesien. (Ibidem p. 29.) 

 Schdnfeld, L. Beizen des Hirsesaatgutes. (Wien. landw. Zeitg. LXVIII [1918], p. 257.) 

 Schoevers, T. A. C. lets over wortelknobbels en andere kankerachtige uitwassen bij 



planten. (Tijdschr. Plantenz. XXIV [1918], p. 123—132, 133—148.) 



— Vreemde lichaampjes in zieke spinaziewortels. (Unknown corfuscules in diseased 

 spinach-roots.) (Med. Landbouw-hoogeschool Wageningen XV [1918], p. 75 — 81, 

 1 PI.) 



Schwangart, F. Uber Rebenschadlinge und -niitzlinge. V. Die Schlupfwespen der 



Traubenwickler. Zuchtergebnisse. (Centralbl. f. Bakt. usw. II. Abt. Bd. XL VIII 



[1918], p. 543—558.) 

 Shear, C. L. Pathological aspects of the federal fruit and vegetable inspection service. 



(Phytopathology VIII [1918], p. 155—160.) 

 Sherbakoff, C. D. Tomato diseases. (Bull. Florida Agric. Experim. Stat. Nr. 146 



[19181, p. 119—132, Fig. 32—44.) 

 Shimbo, I. Beitrage zur Kenntnis einiger einheimischen Pflanzengallen in Japan. I. 



(Bot. Mag. Tokyo XXXII [1918], p. (121)— (128), ill. — Japanese.) 

 Shive, J. W. and Martin, W. H. The effect of surface films of Bordeaux mixture on 



the folias transpiring power in tomato plants. (Plant World XX [1917], p. 67—86.) 

 Smith, E. F. Tumors in plants. (Science II. Vol. XLIV [1916], p. 611 — 612.) 



— and Godfrey, G. H. Brown rot of Solanaceae on Ricinus. (Ibidem N. S. XL VIII 

 [1918], p. 42—43.) 



Smith, R. E. A new apparatus for aseptic ultra filtration. (Phytopathology VII 

 [1917^, p. 290—293, 2 Fig.) 



Spaulding, P. and Pierce, R. G. State and national quarantines against the white 

 pine blister rust. (Phytopathology VII [1917], p. 319—320.) 



