18. Blight powder, Sulphated sulphur. 



(Progres Agricole et Viticole, 1887, p. 39 ; Report of the Mycologist U. S. 

 Dept. Agr., 1886, p. 103; Circular No. 4, Section of Veg. Pathology, U. S. 

 Dept. of Agr., July, 1887.) 



Prepared by thoroughly mixing from 3 to 8 pounds of anhydrous 

 sulphate of copper with 90 to 100 pounds of flowers of sulphur. 



For simultaneous treatment of o'idium and the downy mildew. For 

 downy mildew of the vine. For tomato and potato blight and rot. 



19. Sulphatine, the Esteve process. 



(Bull, de Cent. Soc. de France, 1887, p. 316 : Report of the Mycologist U. S. 

 Dept. of Agr., 1886, p. 102 ; Circular No. — , U. S. Dept, of Agr., April, 1887; 

 Circular No. 4, U. S. Dept. of Agr., July, 1887; Etc.) 



Mix 2 pounds of anhydrous sulphate of copper with 20 pounds of 

 flowers of sulphur and 2 pounds of air-slaked lime. The proportions 

 may be varied. 



For the treatment of mildew. For the treatment of the downy mil- 

 dew and black rot of the grape. For the treatment of the tomato and 

 potato for blight and rot. 



20. Skawinski's powder. 



(La Vigne Arn6ricaine, Nov., 1886; Report of the Mycologist U. S. Dept. of 

 Agr., 1886, p. 104; Cours Complet de Viticulture, G. Foes, 1888, p. 485; 

 Progres Agricole et Viticole, Mar., 1888, p! 222 : Etc.) 



Mix 22 pounds of finely powdered sulphate of copper with 33 pounds 

 of soot or alluvial earth and 165 pounds of coal dust. 



For simultaneous treatment of o'idium and downy mildew of the 

 vine. For treatment of mildew. 



21. Sulfosteatite or cuprique steatite. 



(Le Mildiou, par Dr. G. Patrigeon, 1887, p. 134, Journal dAgriculture Pra- 

 tique, 1887, p. 768; Etc.) 



An exceedingly fine bluish powder composed of steatite, or talc, and 

 sulphate of copper, the proportion of the latter substance amounting to 

 about 10 per cent, Very easily applied ; cousidered the most adherent 

 of all the powders. 



For the treatment of mildew (Peronospora). 



22. David's powder. 



(Journal d'Agr. Pratique, Nov. 25, 1886 ; Report of the Mycologist U. S. 

 Dept. of Agr., 1886, p. 102; Nouvelles Recherches sur le DeVeloppement 

 et le Traitement du Mildiou et de L'Anthracnose, Millardet, Feb., 1887, 

 p. 22; Circular No. 3, Sect, of Veg. Pathol., U. S. Dept, Agr., April. 18S7; 

 Etc.) 



Dissolve 4 pounds of sulphate of copper in the least possible amount 

 of hot water, and slake 16 pounds of lime with the smallest quantity of 

 water required. When the copper solution and slaked lime are com- 

 pletely cooled mix them together thoroughly ; let the compound dry in 

 the sun, crush and sift. Apply with a sulphuring bellows furnished 

 with an outside receptacle for the powder. The copper coming in con- 

 tact with the leather wilT soon destroy it. 

 21004 fu 2 



