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' Roberts, J. W. Control of peach bacterial spot in southern orchards. (U. S. Dept. 
Agric. Bull. no. 543 [1917], 7 pp.) 
— Apple blotch and its control. (U. S. Dept. Agric. Bull. no. 534 [1917], u PPp-, 2 Pls., 
} 3 Figs.) 
 . —— The source of apple bitter-rot infections. (Ibidem Bull. no. 684 [1918], 25 pp., 5 Pls.) 
Rogers, J. M. and Earle, F. S. A simple and effective method of protecting citrus 
against stem-end rot. (Phytopathology VII [1917], p. 361—367.) 
Rolfs, F. M, A bacterial disease of stone fruits. (Cornell Agric. Exp. Stat. Mem. VII 
[1915], p. 381—436, Fig. 59-70.) 
.— Angular leaf-spot of cotton. (S. Carolina Agric. Experim. Stat. Bull. no. 184 
[1915], p. 5—30. Pl. I-IX.) 
Rorer, J. B. A disease of immortel trees. (Bull. Dept. Agric. Trinidad and Tobago XIV 
(1915), p. 128-129.) 
— Citrus canker. (Ibidem p. 130—131.) 
— Cocoanut bud-rot. (Ibidem p. 129—130.) 
‚— Plant diseases and pests. The änthracnose of the mango. (Bull. Dept. Agric. 
Trinidad and Tobago XIV [1915], p. 164-171, Pl. I.) 
— Plant diseases and pests. The pink disease ofcacao. (Ibidem XIV[1916], p.1—-4,2 Fig.) 
— Algal disease of Cacao. (Ibidem XVII [1917], p. 345—348.) 
— The fungous diseases of the Avacado. (Bull. Depart. Agric. len and Tobago 
XVIII [1919], p. 132—133, 3 Pls.) 
—- Fungous diseases of Cassava. (Ibidem XIV [1915], p. 36—39.) 
— The Pink disease of Cacao. (Ibidem XV [19161, p. 86—-89, 2 Figs.) 
' Rose, D. H. Oxidation in healty and diseased apple bark. (Bot. Gazette LX [1915], 
P- 55—65.) 
"Rosen, H. R. A bacterial root-rot of field corn. (Univ. Arkansas Experim. Stat. 
Bull. no. 162 [1919], 6 pp., 4 Pls.) j 
Rosen, H. R. and Kirby, R. S. A comparative morphological study ot aecia of four 
different rusts found upon barberries in North America. (Phytopathology IX 
[1919], p. 569-573, Pl. XXXVIII—XXXIX.) 
Rosenbaum, J. Disease of ginseng. (Cornell Agr. Experim. Stat. Bull. 363 [1915], 
p- 65—106, Fig. 1—18.) ı 
— Infection experiments on tomatoes with Phytophthora terrestria Sherb. and a hot 
. water treatment of the fruit. (Phytopathology X (1920), p. 101—-105.) 
 — Studies with Macrosporium from tomatoes. (Ibidem X [1920], p. 9-—21, Pl. IT—IIT, 
1 Fig.) 
Agric. Experim. Stat. of the Colorado Agric. College Nr. 218 {1916}, 43 pp-, spL, 
£ 1 davon col., Fig. I—III.) 
 — A bacterial stem blight of field and garden peas. (Colorado Aaric Experim 
‚Stat. Bull. no. 218 [1916], p- 3—43, 2 Pls., 3 Fig.) 
— Diseases of beaus. (Bull. no. 234 Agric. Experim. Stat. Colorado Agric. College, 
Fort Collins 1918, p. 23—32, 6 Figs.) 
Salter, R. C. The behavior of legume bacteria in acid and alkaline media. re 
> Jowa Acad. Sci. XXIII [1916], p. 309-313, Fig. AB.) 
Sanders, J. G. Baar Sn EEE Bere (Amer. Forest. xxır on. p- 147153, 
illustr. 
5 The Tre: potato wart disease discovered in Pennsylvania. Month. Bull. 
State Com. Hort. Calif. var pe ı p- 10-12, ER 8 
3 Sackett, Walter, G. A Bacterial Stem Blight of Field and Garden Peas. (Bull. ofthe 
_— A bacterial disease of the Wragg cherry. (Journ. Bact. II ugı7), P- 79-80. ) 
