738 EXPERIMENT STATION RECORD. 



containing 6 per cent copper sulphate and 6 per cent fresli lime; No. 3 

 was sprayed with a 6 per cent solution of iron sulphate and lime; No. 

 6 was sprayed with an 8 per cent Bordeaux mixture ; No. 6 was sprayed 

 with an 8 per cent solution of iron sulphate and lime; No. 8 was sprayed 

 twice, first with a 4 per cent Bordeaux mixture, and 2 weeks later 

 with a 6 per cent solution of the same; No. 9 was treated in the same 

 way, iron sulphate being substituted for the copper sulphate. 



The potatoes were planted April 19 and made their appearance 

 above ground June 7. The spraying was done June 28, and when 

 a second was given it was applied July 12. The potatoes were har- 

 vested September 5. The highest yield as well as per cent of starch 

 was found in jilat 2, while the number of diseased tubers was small. 

 The smallest yield was from plats 6 and 9, the strong solutions of iron 

 sulphate having injured the plants, its effect being plainly seen in the 

 brownish color of the leaves 6 days after spraying. Plats 8 and 9 

 showed the lowest per cent of diseased tubers. The most rotten tubers 

 were found in the unsprayed rows. However, the yield and starch 

 content of each of these plats exceeded those of the treated ones with 

 the exception of plat 2. The author establishes the fact that iron sul- 

 phate injuriously affects the growth of the leaves as well as lessens the 

 yield of tubers. A comparative test of 2 per cent solutions of Bor- 

 deaux mixture and iron sulphate and lime solution is to be undertaken. 



Potato scab, S. B. Gkeen (Minnesota Sta. Ept. 1893,pp. 222-228).— Re^xmteA from 

 Bulletin 32 of the station (E. S. R., 6, p. 57). 



Late blight and rot of the potato, S. B. Green (Minnesota Sta. Bpt. 1892, pp. 

 215-221).— lle^xint trom Bulletin 32 of the station (E. S. R., 6, p. 57). 



A new barley smut, H. Biedenkope {Ztschr. Fflanzenkran'k., 4 (1894), Xo. 6, pp. 

 321, 322). — The author describes as Usiilago medians a new species of smut of barley 

 that from cultures seems to be intermediate in its characters between U. hordei and 

 U.jensenii. A more critical study of the species is to follow. 



List of parasitic plants found near the station, O. Lugger (Minnesota Sta. Rp>t. 



1893, pp. 307-312). — A list of fungi, embracing about 150 species, is given, arranged 

 in the order of their hosts. The more numerous genera represented are as follows: 

 Peronospora, 7 species ; Puccinia, 18 species ; Cercospora, 10 species, and Septoria, 11 

 Bpecies. There are 35 orders of phanerogams represented in the list of hosts. 



New species of fungi, J, B. Ellis and B. M. Everhart (Proc. Phil. Acad. Sci., 



1894, III, pp. 322-3S6). — Descriptions and critical notes on new species. 

 Diseases of the vine (Cont.), G. Massee (Gard. Chron., 17 (1895), aer. 3, p. 134). — 



A brief description of anthracnose (Sphaceloma ampelinum) is given. Dusting 

 plants with equal parts of sulphur and lime is advised. Too free use of fresh stable 

 manure is thought to favor the development of the disease. 



Chytridiose of the grape and its treatment, A. Prunet (Prog. Agr. et Fit., 12 

 (1895), Xo. 3, pp. 73-76; Xo. 4, pp. 91-98). 



Sulphuric acid for grape anthracnose, L. Degrully (Prog. Agr. et Vit., 12 (1895), 

 Xo. 6, pp. 135, 136). — Ten liters of sulphuric acid to 100 of water gave good results 

 when applied to grapes, equaling the acid iron sulphate solution without the trouble 

 and expense of the copperas. 



Report on experiments with "Postite", 1894, W, M. Schoten (Tidskr. norske 

 Landbr., 1 (1894), pp. 441-443).— ThQ Fostite (90 per cent magnesium silicate, 10 per 

 cent copper sulphate) was applied with some degree of success against fungus dis- 

 eases of potatoes and other crops. 



