Algae. — ^"ungi, Bacteria und Pathologie. 307 



Moore, G. T. and K. F. Kellerman, Copper as an Algicide 

 and Disinf ectant in Wat er Su p plies. (U. S. Dept. Agric. 

 Bureau of Plant Industry Buli. 7b. 1905. p. 1—55.) 



Contains report of the treatment of over 50 reservoirs diiring the 

 Summer of 1904. A number of points of practical impoitance are 

 brought out 



Ihe treatment has been found to be entirely successful and less 

 copper sulphate is requiied to eradicate algae in the open, than is 

 necessary under laboratory conditions. H. M. Richards (New Yorkj. 



Carleton, M. A., Lessons from the grain-rust epide- 



mic of 1904. (U. S. Dept. Agric. Farmer's Bull. 219. 1905. 



p. 1-24.) 



The black stem rust caused much damage to wheat and oats in 

 most parts of the United States in 1904. The unusual amount of 

 moisture at the time when most damage could be done by the fungus, 

 and the unusual delay in the ripening of the grain caused the attack to 

 be particulariy severe. Grain from a rusted crop will not carry the 

 disease but is like all other light weight seed. Imported durum wheats 

 gave large yields and were nearly or quite imune to the trouble. The 

 hard grained Russian winter wheats were more resistant than ordinary 

 kinds; early varieties escape much of the effect of rust attacks. Seed 

 selection is empasized. Perley Spaulding. 



Chester, f., A r e V i e w o { t h e Bacillus subtllis g r o u p o f 

 bacteria. (Centralbl. f. Bakt. IL Abt. 1904. Bd. XIII. 

 p. 737—752.) 



Behandelt werden Bacillus asterosporus (Meyer) Mig., B. ruminatus 

 Gotth., B. Megatherium de By, B. cereiis Franke, B. niycoides Flügg., 

 B. tumesceiis Zpf., B. subtiUs Cohn (emend.), B. slmplex Gotth., 

 B. mesentericus Flügg., ß. fusciformis Gotth. in zusammenfassenden 

 Einzelcapiteln : 1. Morphologie. 2. Culturelle Eigenschaften. 3. Chemische 

 • Wirkungen. 4. Classification. 5. Litteratur, Synonymik. 



Die tabellarisch zusammengestellten Details ermöglichen einen 

 schnellen Vergleich und geben eine gute Uebersicht, es muss dieserhalb 

 auf das Original verwiesen werden. Wehmer (Hannover). 



Emerson, R. A., Apple s c a b and c e d a r rust. (Bull. Ne- 

 braska Agric. Expt. Station 88. 1905. p. 1—21.) 



The resuits of experimental spraying work show that cedar rust on 

 apples can be checked by spraying the apple trees with Bordeaux 

 mixture when the cedar apples are in condition to give off spores fully. 

 A second spraying should follow in about ten days or two weeks. This 

 fact has special significance to the fruit growers of the prairie states 

 since it is not practicable to remove the cedar trees, they being of as 

 much or more value than are the fruit trees themselves. Wealthy 

 and Johnathan are said to be more susceptible than other varieties. 

 Two sprayings, one just before the apple blossoms open and the second 

 just after they fall, will control the apple scab ordinarily. The sprayings 

 for both diseases generally coincide so that a single set of sprayings 

 will check both troubles. Perley Spaulding. 



Kellerman, W. A., Mycological Bulletin. XXV. p. 97 

 — 100. iigs. 81—83. Jan.^ 1, 1905. XXVI. p. 101-104. 

 figs. 84—86. Jan. 15, 1905. XXVII. p. 105—108. iigs. 87 

 —89. Feb. 1, 1905. XXVIII. p. 109-112. figs. 90-91. 

 Feb. 15, 1905. 20* 



