42] Exotische Nutzpflanzen. 459 



Pilzes ein, welcher wahrselieinlich die Ursache der „Mal di gomma" genannten 

 Krankheit der C/irus-Büume ist. 



629. Faweett, H. S. Brown rot gummosis of Citrus. (Californ. 

 Cult. XLIII, Nr. 6, 191J, p. 124.) — Betrifft Pythiacystis citrophthora. 



630. Fawcett. H. S. Citrus diseases of Florida and Cuha 

 compared with tliose of California. (California Agric. Exjjer. Stat. 

 Bull. Nr. 262, 1915, p. 153-192, 200-202, 207-210, 23 Fig.) 



631. Fawcett, H. S. Citrus canker in Florida and the Gulf 

 States. (Monthly Bull. State Com. Hort. California III, Nr. 12, December 



1914, p. 512-513.) 



632. Hasse. C. H. Pseudomonas citri, the cause of Citrus canker. 

 (A. prelimiuary report.) (Journ. Agric. Kesearch IV, 1915, p. 97 — 100, 

 2 PI.) 



633. Jolinston, John Robert. The Citrus canker. (Modern Cuba 

 III, Nr. 11, 1914, p. 63, 1 fig.) 



635. O'Byrne, F. M. The danger of Citrus canker. (Florida 

 Grower XII, Nr. 22, 1915, p. 12 — 13.) — Pseudomonas Citri. 



636. Petoh, T. Citrus mildew. rPhytopathology V, 1915, p. 350 

 bis 352.) 



637. Prlzer. J. A. Some experiments in treating Citrus trees 

 ior gummosis and heart-rot. (Monthly Bull. State Com. Hort. Cali- 

 fornia IV, Nr. 1, 1915, p. 7-19, fig. 1-7.) 



638. Pri/er, J. A. Some experiments in treating Citrus trees 

 for gummosis. ^Proceed. 45th Fruit G-rowers' Conv. California 1914, ersch. 



1915, p. 218-229, fig. 30-36*.) 



639. Rolfs, Peter Henry. Seeking adequate means of control 

 of Citrus canker. (Florida Grower XI, 1915, p. 20-21.) 



640. Rorer, J. B. Citrus canker. (Bull. Dept. Agric. Trinidad and 

 Tobago XIV, 1915, p. 130 — 131.) — Pseudomonas Citri. 



641. Rushton, W. A prelimiuary investigatioii as to the 

 cause of rottin g of oranges from Brazil. (Ann. appl. Biol. I, 

 1915, p. 365 — 369.) — Penidllium italicum schädigend auf Orangen in 

 Brasilien. 



642. Stevens. H. E. Citrus canker and its cause. (Florida Grower 

 XII, Nr. 24, October 1915, p. 8 — 9.) — Pseudomonas Citri. 



643. Stevens, H. E. Citrus diseases and how to know them. 

 (Florida Grower XII, Nr. 21, p. 7; Nr. 22, p. 17; Nr. 23, p. 2-3; Nr. 24, 

 p. 2-3; Nr. 25, p. 2-3, 1915.) 



644. Stevens, H. E. Studies of Citrus canker. (Bull. Florida 

 Agr. Exp. Stat. Nr. 124, 1914, p. 31-43, 6 flg.) 



645. Stevens, H. E. Citrus canker. (Florida Growers' and Shippers' 

 League Bull. Nr. 1, 1914, p. 6-8.) 



646. Stevens, H. E. Citrus canker. III. (Florida Agric. Exper. 

 Stat. Bull. Nr. 128, 1915, 20 pp., 6 Fig.) — Behandelt Pseudomonas Citri Hasse. 



647. Stevens, H. E. Citrus canker. (Florida Grower XII, Nr. 16, 

 1915, p. 13-15.) 



648. Stevens, H. E. Citrus canker and picking implements. 

 (Florida Grower XI, Nr. 3. 1914, p. 15.) 



649. Stevens, H. E. No eure for Citrus canker. (Florida Grower 

 XI, Nr. 12, 1914, p. 17.) 



