(86) 
Orton, C. R. Phytophthora infestans on tomatoes in Australia. (Phytopatho- 
logy VI [1916], p. 447.) 
— The Long Island Potato disease conference. (Phytopathology IX [1919], 
p. 536537.) 
— Diseases of the apple, pear and quince. (Proceed. Pennsylvania State Hort. Assoc. 
1916, p. 45—52, Fig. 1—7.) 
— Diseases of the brambles and methods of controlling them. (Ibidem p. 66—71, 
Fig. 1—7.) 
Orton, C. R. and Adams, J.F. Collarblight and related forms of fire-blight. (Pennsyl- 
vania Agr. Exp. Stat. Bull. 136 [1915], p- 1—23, Fig. 1—13.) 
Orton, C. R. and Me Kinney, W. H. Notes on some tomato diseases. (Ann. Rep. 
Pennsylvania Agric. Experim. Stat. 1915—1916 [1917], p. 1—9.) 
— — Winter blight of the tomato. (Ann. Rep. Pennsylvania State College [1914—15] 
1916, p. 235—246, Pl. VI.) N 
—- Watermelon diseases. (U. S. Dept. Agric. Farmers Bull. no. 821 [1917], 18 pp., 
11 Fig.) , 
Orton, C. R. Notes on some polemoniaceous rusts. (Mycologia XI [1919], Nr. 4, 
p- 168—180.) 
Osmun, A. V. Common potato diseases and their control. (Ann. Rep. Massachusetts 
‚State Board Agric. XV [1918], p. 125— 133, Fig. 1—8.) 
Osmun, A. V, and Anderson, P. J. Ring-spot of cauliflower. (Phytopathology V 
- [1915], p- 260—265, Fig. 1—4.) 
Osner, G. A. Additions to the list of plant diseases of economic importance in Indiana. 
(Proceed. Indiana Acad. Sci. [1916] 1917, p. 327—332.) 
— Leaf smut of timotlıy. (Cornell Agric. Experim. Stat. Bull. 381 [1916], p. 187—230, 
Pl. XVII, Fig. 45—58.) 
Overholts, L. O0. An undescribed timber decay of nitch pine. (Mycologia IX [1917], 
p- 261—270, Pl. XII—XIII.) ? 
Fammel, L. H. The extermination of the common barberry to prevent crop leakage 
due to stem rust. (Jowa Conservation II [1918], p. 4—8.) ; 
— Recent literature on fungous diseases of plants. (Transact. Jowa Hort. Soc. LIIl 
(1918], p. 185—225.) ; 
Pammel, L. H., King, C, M. and Seal, J. L. Studies on a Fusarivm disease of corn 
and sorghum (Preliminary). (Jowa Agric. Experim. Stat. Research Bull. XXXIIL 
[1916], p. 115—136, Fig. 2—15.) 
Parisi, R. Parasites vegetaux et animeaux de quelques plantes medicinales et ä essences, 
observes en Italie. (Rivista di Patologia vegetale XI [1921], p. 1-16.) 
Parker, J. H. Greenhouse experiments on the rust resistance of oat varieties. (U. S- 
Dept. Agric. Bull. no. 629, 16pp., 3 Pls., 2 Figs.) ; 
Patterson, F. W.et Charles, V. 'K. The occurrence of bamboo smutin America. (Phyto- 
pathology VI [1916], p. 351-356, 1 Fig.) 
Paul, B. H, The pine blister rust\ (New York Pub. Cons. Comm. Bull. XV [1917), 
p- 1—18, illustr.) ? 
Peltier, George L. Influence of Temperature and Humidity on the Growth of Pseudo- 
monas Citri and its Host Plants and on Infection and Development of the Disease. 
(Journ. Agric. Research Washington XX [1920], p. 447—-506.) 
— Snapdragon rust. (Bull. Univ. Illin. Agric. Experim. Stat. no. 221 [1919], 
p- 535—548, 5 Figs.) 
— Carnation stem rot and its control. (Illinois Agric. Experim. Stat. Bull. no. 223 
[1919], p. 579607, 5 Figs.) 
