The Bulletin. 



13 



effect on the tree in removing moss, dead bark, etc. Such a practice 

 would also check the scale if it should get started at any time, and would 

 entirely prevent the scale from killing dozens or hundreds of valuable 

 trees before it is discovered, as it often does. 



The Lime-sulphur Wash has its disadvantages. It is somewhat trouble- 

 some to prepare, and is destructive to spray pumps by reason of its 

 corrosive action. This latter point should be provided against by pur- 

 chasing pumps with all working parts, or all parts which come in contact 

 with the material, of brass, as brass will withstand it quite well. Copper 

 pumps or tanks are quickly destroyed by it. 



Fig. 4. — Making Lime-sulphur Wash. Outfit used in preparing wash 

 for orchard of 400 young peach trees. (Photo by Sherman.) 



Ample experience has proven that salt, bluestone or other material 

 added to the wash merely adds to the expense and do not materially add 

 to its effectiveness. The lime and the sulphur are the only materials 

 needed. 



There is some variation in the quantities of lime and sulphur used by 

 growers to make a barrel of this wash, two men with orchards standing 

 side by side often using different quantities with practically the same 

 results. Therefore, a slight departure from the fixed formulas is not a 

 serious matter, and this safety with which it may be used is a strong 

 point in its favor. The following will be found satisfactory for pre- 

 paring one barrel of the wash. Smaller or larger quantities may be 

 prepared by using different amounts, but observing the same proportions: 



Stone lime 15 pounds. 



Sulphur (flowers) 15 pounds. 



"Water (to make) 50 gallons. 



Heat from 4 to 6 gallons of water to boiling over fire in large iron or 

 brass kettle. Mix the sulphur with enough hot water to make a thin 

 paste and pour it into the kettle with the hot water. Now add the lime 



