Fungicides, for Plant Diseases. 41 



Eau celeste, continued. 



mildew and black-rot of the grape, anthracnose, and blight 

 and rot of the tomato and potato. 



2. Dissolve i Ib. of sulphate of copper in 2 gals, of 

 water. In another vessel dissolve i Ib. of carbonate of 

 soda. Mix the two solutions. When chemical reaction 

 has ceased, add i l / 2 pts. of ammonia, then dilute to 22 gals. 

 For the same purpose as No. i, and probably better. 



Orison liquid (Eau Grisori). Prepared by boiling 3 Ibs. 

 each of flowers of sulphur and lime in 6 gals, of water 

 until reduced to two gallons When settled, pour off the 

 clear liquid and bottle it. When used, mix i pt. of clear 

 liquid in 100 parts of water. For mildew and pow- 

 dery mildew of vines. 



Milk of lime. Simple solution in water, 2 to 6 parts lime 

 to 100 parts water. For mildew and anthracnose. 



Podeschard's powder. Dissolve 45 Ibs. of sulphate of 

 copper in water. When thoroughly dissolved, pour the 

 solution upon 225 Ibs. of air-slaked lime, which is sur- 

 rounded by 30 Ibs. of ashes to keep the liquid from spread- 

 ing. After 24 hours, add 20 pounds of flowers of sul- 

 phur. Thoroughly mix the compound, ashes and all. 

 When dry sift through a sieve with meshes of one-eighth 

 inch. Will keep for months. For downy mildew, mil- 

 dew and anthracnose. 



Potassium sulphide. Used at the rate of J or \ oz. to 

 the gal. of water. 



Skawinski's powder. Mix 22 Ibs. of finely powdered 

 sulphate of copper with 33 Ibs. of soot or alluvial earth 

 and 165 Ibs. of coal dust. For treatment of mildews. 



Skawinski's sulphate of iron and sulphuric acid solution. 

 Sulphate of iron, no Ibs.; sulphuric acid (53 degrees), ij^ 

 pts. ; .warm water, 22 gals. Pour sulphuric acid on the 

 crystals of iron, then add the water. Use while warm. 



