G19 



Verbena mildew, L. H. Bailey, M. S. (p. 405), — Sulpliide of 

 ixjtassium (oue fourth of au ounce to 1 gallou of water) lias been found 

 to be an efi'ective remedy for Oidium erysiphioides on greenhouse plants. 



North Dakota Station, Bulletin No. 3, October, 1891 (pp. 14). 



Dlseases of sheep, T. D. Hinebauch, V. S. — Popular notes on the 

 syuiptonis and tieatniont of anthrax, contagious and sporadic foot rot, 

 head and connnon scab, intiamniation of the lungs, and pleurisy. 



North Dakota Station, Bulletin No. 4, December, 1891 (pp. 31). 



Potato scab, nature and treatment, H. L. Bolley, M. S, (pp. 

 '*»-l 7 and Ul—U, plates 2, tigs. 4). — The nature of this disease is discussed 

 \\ ith special reference to the investigations of the author reported in the 

 Proceedings of the American Association for the Advancement of Sci- 

 ence, August, 1890, and in Agricultural Science, vol. iv, Xos. 9 and 1<>, and 

 those of R. Thaxter, reported in bulletin No. 105 and in the Annnal 

 Report of the Connecticut State Station for 1890 (see Experiment Station 

 Record, vol. ii, p. 490, and vol. iir, p. 9). Additional observations by the 

 author showing that the fungus discovered by Thaxter is the cause of 

 the scab, are cited, with illustrations. The author is still inclined to 

 doubt the existence of "deep" and "surface" scab as distinct diseases. 

 Microscopic examinations and culture tests have indicated that i)otato 

 scab is common on beets. Swedish turnips, carrots, and cabbage roots 

 are also apparently affected by the same disease. Experiments in 

 planting potatoes in various kinds of soil and under different conditions 

 have indicated that (1) scabby seed potatoes will induce the disease in 

 the new crop upon any kind of soil, and (2) the disease germs will remain 

 from year to year in ground where potatoes have grown. Notes and 

 tabulated data are given for laboratory and field experiments with 

 the following preventive treatments of seed tubers: (1) Bru.shing 

 and washing clean with water; {2) soaking in solutions of corrosive 

 sublimate (0,001 to 0.003 per cent), potassium sulphide {(>.'> per cent), 

 potassium hydrate (0.5 per cent), hydrochloric acid (3 per cent), copper 

 sulphate, or hot water (55° to 60° C.)j (3) drying in a hot oven (45° to 

 80° C); (4) rolling in sulphur; (5) exposing to sulphur fumes (2.5 hours). 

 The results indicate that brushing and washing tubers selected with 

 reference to their freedom from scab, will insure a healthy crop on unin- 

 fected land, and that soaking in a weak solution of corrosive sublimate 

 is an effective remedy, but hardly to be recommended on account of its 

 poisonous nature. Potassium sulphide and hydrochloric acid have 

 given promising results. 



Hastening the maturity of potatoes, H. L, Bolley, M, S. (pp. 

 18-20, fig, t). — A brief account of small experiments in which Early 

 Eose and Charles Downing potatoes, planted after being allowed to 

 sprout from 2 to 5 months in a light, dry room, were compared with 



