86 beginners' guide to fruit growing 



mass. Keep this as a stock, and use one part in nine 

 of water for soft-bodied insects such as plant lice. 



DUST spraying 



Fungicides and insecticides are sometimes applied 

 as a dry powder instead of as a liquid spray. In 

 this case a special blower is used in place of the 

 regulation pump. The dust method of spraying, 

 however, is generally regarded as the lazy man's 

 makeshift, and is not to be adopted where the ordi- 

 nary methods are available. The dust spray has been 

 found most useful where water for making solu- 

 tions is very scarce, or on certain very rough and 

 rocky lands where the barrel pump could not be car- 

 ried. Thus, it has happened to be more at home 

 in the Missouri Ozarks than elsewhere. The fol- 

 lowing directions are adopted bodily from Missouri : 



TO MAKE 70 POUNDS OF STOCK POWDER 



4 pounds copper sulphate 



4 pounds quicklime 



2j4 gallons water in which to dissolve 



copper sulphate 

 2j4 gallons water in which to slake 



quicklime 

 60 pounds air slaked lime thoroughly 



sifted 



Dissolve the copper sulphate and slake quicklime 

 separately, each in 2j^ gallons water. Pour at same 

 time milk of lime and copper solution into a third 

 vessel and stir thoroughly. Surplus water is then 

 strained out and remaining wet material is thor- 

 oufjhly mixed with the 60 pounds of air-slaked lime. 



