452 P. Sydow: Pflanzenkrankheiten. [35 



519. Ortoii, C. R. The newer diseases of fruit trees and latest 

 development in their treatment. (Proceed. Ann. Com. Fruit Growers' 

 Aseoc. Adams Co., Pennsylvania IX, 1913, p. 77 — 89, 5 Fig.) 



520. Ostcrwalder. A. Zur Schorf bekämpf ung. (Schweiz. Zeitschr. 

 f. Obst- u. Weinbau 1915, p. 209-211.) 



521. Osterwalder, A. Die Kernhausfäule der Äpfel. (Schweiz. 

 Zeitschr. f. Obst- u. Weinbau XXIV. 1915, p. 289-292, 1 Textfig.) - Ver- 

 ursacher der Kernhausfäule ist Fusarium putrefaciens. 



522. Peek, Charles H. A new fungus enemy of the maple. 

 (New York State Museum, Bull. 176, 1915, p. 7.) — Steganosporium piri forme 

 (Hoffm.) Cda. 



523. Posey, G. B. Studies of Monilia blight of fruit trees. 

 (Abstract.) (Phytopathology V, 1915, p. 294.) — Abstract. (Science, 

 N. S. XLII, 1915, p. 583.) - Monilia spec. 



524. Reddick, D. and ToaD, L. A. Fall spraying for peach leaf 

 curl. (New York Cornell Agric. Exp. Stat. Circ. Nr. 31, 1915, p. 65-73.) - 

 Exoascus deformans. 



525. Rees, H. L. Apple anthracnose or black spot canker. 

 (West. Washington Agric. Exper. Stat. Monthly Bull. II, Nr. 7, October 1914, 

 12 pp.) 



526. Robb. F. G. Some common apple tree cankers in the 

 Ozarks. (Proceed. Arkansas State Hort. Soc. 31/32. Ann. Meet. 1912/13, 

 ersch. 1914, p. 23-25.) 



527. Roberts, John William. The sources of apple bitter rot 

 infection and control. (Ozark Fruit and Farms V, 1914, Nr. 2, p. 3.) 



528. Roberts. J. W. Sources of the early iufections of apple - 

 bitter -rot. (Journ. agr. Research IV, 1915, p. 59 — 64, tab. VII.) — Glome- 

 rella cingulata. 



529. Rose, Dean H. Oxidation in healthy and diseased apple 

 bark. (Bot. Gaz;. LX, Nr. 1, 1915, p. 55 — 65.) — Nummularia discrpta 

 (Schw.) Tul. 



530. Schalfiiit, F. Flugblattsammlung über Pflanzenschutz. 

 Bonn -Poppeisdorf. (Pflanzenschiitzstelle an der Kgl. Landwirtschattl. 

 Akademie 1915, 4", Flugbl. Nr. 7.) — Monilia an Obstbäumen. 



531. Sclioevers, T. A. C. Perzikschurft (,, Peach scab") in Neder- 

 land. (Tijdschr. over Plantenziekten XXI, 1915, p. 26-29, 1 tab.) 



532. Stoiie, G. E. Apple diseases. (Oirc. State Board Agric. Massa- 

 chusetts, Nr. 12, 1914.) 



533. Swingie, Deaiie Bret. Apple blight. (Proc. Ann. Sess. Montana 

 State Hort. Sess. XVII, 1914, p. 102-108, fig. 5-7.) 



534. Takahashi, Y. On the flower-wilt and young fruit-rot 

 of the apple -tree caused by Sclerotinia Mali n. sp. (Bot. Mag. Tokyo 

 XXIX, 1915, p. [217] -[223].) - Japanisch.) N. A. 



Beschreibung von Sclerotinia Mali n. sp. auf Blättern, Blattstielen, 

 Blütenstielen, jungen Zweigen und Früchten von Pirus Malus. Die Art ist 

 mit Sei. Kusanoi P. Henn. verwandt. Infektions versuche ergaben die Ver- 

 schiedenheit beider Pilze. 



535. Valleau, W. D. Varietal resistance of plums to brown- 

 rot. (Journ. of Agric. Research, Washington V, 1915, p. 365 — 395, tab. 

 XXXVTT -XXXIX.) - Siehe „Pilze" 1915, Ref. Nr. 593. 



