42 The Horticulturist' s Rule-Book. 



Soda hyposulphite. i. \ oz. to 10 gals, of water. For 

 gooseberry mildew and apple scab. 



2. i Ib. in 10 gals, of water. For celery-leaf blight, 

 orange-leaf blight, apple scab. Should be used as soon as 

 prepared. Probably too strong. 



Sulfosteatite or Cuprique steatite. An exceedingly fine 

 bluish powder composed of steatite, or talc, and about 

 10 per cent, of sulphate of copper. Considered the most 

 adherent of all fungicide powders. For mildews. 



Sulphate of copper. i. Dissolve i Ib. of pure sulphate of 

 copper in '25 gals, of water. For treatment of downy 

 mildew and black-rot of the grape. Dilute it a little for 

 young foliage. 



2. Dissolve 5 to 8 Ibs. in 10 gals, of water. For soaking 

 grains previous to sowing to destroy spores of smuts. The 

 Germans use a y 2 per cent, solution, and soak the grains 

 for about 16 hours. 



Sulphate of iron. i. Simple solution in water of 4 to 8 

 Ibs. to the gal. To be used only as a wash. For anthrac- 

 nose of vine and raspberry. 



2. For a spray, dissolve about ij/f Ib. to the gal. 



Sulphatine, the Esteve process. Mix 2 Ibs. of anhydrous 

 sulphate of copper with 20 Ibs. of flowers of sulphur and 

 2 Ibs. of air-slaked lime. For mildew, downy mildew and 

 black-rot of grape, tomato and potato blight and rot. 



Sulphide, or sulphuret, of potassium (Liver of sulphur). 

 Simple solution in water of ' ^ to i oz. to the gal. For 

 mildew in greenhouses, mildew on roses, erinose of vine, 

 orange-leaf scab, celery-leaf blight, pear and apple scab 

 and various rots. 



Sulphide of soda wash (HilgarcFs). Dissolve 30 Ibs. of 

 whale-oil soap in 60 gals, of water by heating the two to- 

 gether thoroughly. Then boil 3 Ibs. of American concen- 

 trated lye with 6 Ibs. of sulphur and 2 gals, of water. 

 When thoroughly dissolved it is a dark brown liquid, 



