Fungicides, for Plant Diseases. 43 



Snlphide of soda wash, continued. 



chemically called sulphide of soda. Mix the two the 

 soap and the sulphur well, and allow them to boil for 

 half an hour, then add 90 gals, of water to the mixture, 

 and it is ready for use. Apply it warm by means of a 

 spray pump. Used warm, its effect is better and less ma- 

 terial is required than when cold. For apple scab. 

 Sulphur. In its dry and pulverized state, sulphur, known 

 as flowers of sulphur, is often a valuable fungicide, particu- 

 larly for surface mildew. In the greenhouse it may also be 

 used in fumes. Evaporate it over a steady heat, as an oil 

 stove, until the house is filled with the vapor. It should 

 never be heated to the burning point, as burning sulphur 

 quickly destroys most plants. It may also be used in 

 water, in the proportion of an oz. of sulphur to 5 gals, of 

 water. 



Sulphur and lime. A mixture of sulphur and lime in 

 equal parts by weight. For anthracnose during growing 

 season. 



Some fungicides may be added to London purple or Paris 

 green mixtures, and both plant diseases and insects may be 

 fought with one application. An ounce of the arsenites to ten 

 gallons of Bordeaux mixture is recommended for potatoes. The 

 arsenites may be combined with soda hyposulphite, and other 

 compounds 



