DISEASES OF PLANTS. 365 



ommended that each treatment be followed with the application of 

 powdered sulphate of copper. 



A second series of experiments was conducted in a vineyard which 

 was situated on a hillside with a southern exposure, the soil of which 

 was clay. In this experiment different strengths of the 2 fungicides 

 were compared. Three of the sprayings were followed with applica- 

 tions of sulphur. Bordeaux mixture used in full strength and acetate 

 of copper in full strength or in half strength saved the vines from the 

 attacks of the fungus. The half-strength Bordeaux mixture was less 

 efficient, some of the vines being slightly injured. Sugar determina- 

 tions of the grapes grown on vines receiving the different treatments 

 showed practically no differences. 



Another experiment made near by and conducted on a somewhat 

 similar plan proved an almost total failure. In this case the vineyard 

 was in a low-lying place ; the soil was wet. Peronospora developed rap- 

 idly on the plants and the treatment was evidently begun too Late in 

 the season. 



The authors conclude from their experiments that the acetate of cop- 

 per is an active preventive agent against Peronospora, being about 

 equal to Bordeaux mixture and in some respects better, as somewhat 

 less is required than of Bordeaux mixture. The authors think, how- 

 ever, that more than 3 applications are necessary, that number being 

 recommended by the manufacturers of the Stecher powder. From an 

 economic consideration of the subject, they believe acetate of copper 

 is not adapted to general use, as the cost is considerably greater than 

 an equal amount of Bordeaux mixture. 



Investigations on the life history of the rust fungi, E. Fischer (Beitr. Krypto- 

 gamenflora, Seined:., 1 (1S98), No. 1, pp. X-\-l:l. pis. 2, figs. 16). 



Notes on the Uredineae of Mexico, P. Diktel (Hedwigia, 37 (1898), Xo. 4, pp. 

 Juj-jll). 



Trametes pusilla on sugar cane, M. Raciborski (Arch. Java Snikerind., 1898, Xo. 

 11, pp. 9, 10). 



Concerning the injuries and diseases of fruit trees during 1897 and the rela- 

 tion of the weather to the same, Adkruoed (Ueber die in den letzten Jain-en in 

 Schleisen besonders hervorgetretenen Schaden wnd nnserer Obstbaume und ihre Bezie- 

 hungen zum Wetter. Breslau, 1S9S, pp. 27). 



A disease of mulberry trees in Japan, Iciiikawa (Forsll. Naturw. Ztschr., 7 

 (1898), Xo. 7, pp. 247,248). 



A fungus disease of Arundo donax, R. Blanchard (Arch. Parasit., 1 ( 1898), No. 

 3, pp. 503-512). 



Pear blight and its treatment, M. B. Waite (/'astern Xetc York Hurt.. .' (1S9S), 

 Xo. l,pp. 4, 5, jigs. 4). 



Notes on Septoria parasitica, Rtdoi.ph (Forsll. Naturw. Ztschr., 1 (1898), Xo. S, 

 pp. 203-,?;.;, pi. i). 



Mildew and the contest against it in the vineyard, A. I. Pogibka (Odessa. / 

 pp. 10: ahs. in Selsk. Khoz. i Lyesor., 190 (189S), July, pp. 2J9. 230). 



Parasitic fungi of the Russian forest trees, A. A. YaCHIVSKI (Rpt. Mir.. Ayr. and 

 Govt. Estates, Dept. Forestry. St. Petersburg, 1897, pp. 11+150, ml. pis 28; abs. in Selsk. 

 Khoz. i Lytsov., 190 (1898), July, p. 229). — For foresters aud forest growers. 



