284 F. Petra k: Pilze 1919 (ohne die Schizomyceten und Flechten). [70 



687. Osborn, Th. G. B. Blackleg disease of eabbages. (Journ. 

 Dept. Agr. S. Austral. XXIII, 1919, p. 107—110.) 



688. Ossur. Stemphylium Leafspot of cucumbers. (Jouni. of 

 Agric. Research. XIII, Nr. 5, 1918.) — Siehe „Pflanzenkrankheiten", Ref. 

 Nr. 166. 



689. Owen, M. N. The skin disease of potato tubers {Oospora 

 pustulans). (Roy. Bot. Gard. Kew Bull. Mise. Inform. 1919, p. 289—301, 



,1 tab.) 



690. Pape, H. Die Gloeosporium-F änle der Äpfel. (Erfurter Führer 

 im Obst- u. Gartenbau, 20. Jahrg., 1919, Nr. 33, p. 257—258.) — Siehe 

 „Pflanzenkraukheiten", Ref. Nr. 254. 



691. Pape, H. Die wichtigeren pflanzlichen Schädlinge 

 unserer Ölgewächse. (Deutsche landw. Presse 1919, p. 467.) — Siehe 

 „Pflanzenkrankheiten", Ref. Nr. 212. 



692. Pater, B. Bäbaseprö a Körtefän. [Hexenbesen am Birn- 

 baum.] (Bot. Muz. Füzetek III, 1919, p. 12—16, 1 tab.) 



693. Peltier, G. L. Snajidragon rust. (Illinois Agr. Exp. Stat. 

 Bull. Nr. 221, 1919, p. 535—548, 5 Fig.) 



694. Peltier, G. L. Carnation stem rot and its control. (Illinois 

 Agr. Exp. Stat. Bull. Nr. 223, 1919, p. 579—607, 5 Fig.) 



695. Petch, T. Fungus diseases. (Yearbook Ceylon Agr. Soc. 

 1919/20, publ. 1919, p. 114—120.) 



696. Petch, T. Citrus mildew: a correction. (Phytopathology IX, 

 1919, p. 266.) 



697. Pethybridge, G. H. Notes on some saprophytic species 

 of fungi, associated with diseased potato plants and tubers. 

 (Transact. Brit. Mycol. Soc. VI, 1919, p. 104—120, tab. 3—4.) 



698. Pethybrids'e, G. H. and Lafferty, H. A. A Disease of Flax 

 Seedlings Caused by a Species of Colletoiriclium and transmitted 

 by infected Seed. (Sc. Proc. R. Dublin Soc. N. Ser. XV, 1916—1920, 

 Nr. 30, ersch. 1918, p. 359—384, 2 Taf.) 



699. Pipal, F. L. White top and its control. (Purdue Univ. 

 Agric. Exper. Stat. Circ. Nr. 85, 1918, p. 1—12, Fig. 1—8.) 



700. Piper, C. V. and €oe, H. S. Rhizoctonia in lawns and pastures. 

 (Phytopathology IX, 1919, p. 89—92, 2 PI.) 



701. Pratt, A. 0. Soll fungi in relation to diseases of the 

 Irish potato in southern Idaho. (Journ. of Agric. Research XIII, 

 1918, p. 73—79, 2 Taf.) — Siehe „Pflanzenkrankheiten", Ref. Nr. 139. 



702. Putterill, V. A. A new apple tree canker. (South Afric. 

 Journ. Sei. XVII, 1919, p. 258—271, tab. 21—30.) 



703. Putterill, V. A. Notes on the morphology and life history 

 of Uromyces Aloes Cke. (South Afric. Journ. Sc. XV, 1919, p. 656—662, 

 2 tab.) 



704. Bankin, W. H. Manual of tree diseases. New York (Mac- 

 millan Co.) 1919, XX et 400 pp., 70 Fig. 



705. Reinkinj;, 0. Philippine plant diseases. (Phytopathology 

 IX, 1919, p. 114—140.) 



706. Reinkinif, 0. A. Diseases of economic plants in Southern 

 China. (Coli, of Agricult. Univ. of the Philippines VIII, Nr. 4, Nov. 1919, 

 p. 111—135, 3 PI.) — Siehe „Pflanzenkrankheiten", Ref. Nr. 322. 



