GARDEN AND ORCHARD SPRAYS 211 



general purpose as Bordeaux mixture. It has the advantage 

 of not injuring certain plants, such as peaches and plums, 

 to which Bordeaux mixture is not adapted. Some fruit 

 growers are coming to employ it as their principal fungi- 

 cide. 



Composition. The strength of the mixture may 

 vary, the proportion of the ingredients commonly being : 



8 pounds of flour of sulphur. 

 8 pounds of fresh lime. 

 50 gallons of water. 



Making the mixture. The lime-sulphur compound 

 may be made by several different processes, one of the sim- 

 plest of which is the self-boiling process. To make the self- 

 boiled mixture, put eight pounds of lime to slake, and while 

 the slaking process is going on, sift over the lime eight 

 pounds of finely powdered sulphur. Stir constantly, adding 

 water until a thin paste is secured. Dilute to fifty gallons, 

 and strain before using. 



Lime-sulphur may be also bought ready for use. Al- 

 though it costs slightly more than the home-made product, 

 the time saved makes the commercial form cheaper if but 

 a small amount is required. 



Use. Lime-sulphur controls scale insects and cur- 

 culio, as well as such fungous diseases as scab, leaf curl, 

 brown rot, etc. Arsenate of lead may be used with this 

 mixture also. 



3. Arsenate of Lead 



Arsenate of lead is one of the most important stomach 

 insecticides known, and has largely taken the place of Paris 

 green with most fruit growers. It seems to be palatable 

 to all garden insects. It adheres well to foliage, and hence 

 does not easily wash off in showers as does Paris green. It 

 will not injure plants no matter how strong the solution. 



