SPRAYING 259 



Nebraska, after a long series of careful tests of prices and effec- 

 tiveness of the various methods and materials, it was found that 

 trees could be thoroughly sprayed for from 18 to 25 cents each 

 during the season. The cost of 1000 gallons of arsenate of lead 

 and Bordeaux mixture, which is sufficient to spray 500 trees quite 

 thoroughly once, will approximate $6.60. One can spray a tree 

 four times quite satisfactorily with 8 or 10 gallons of spray material. 



The cost of labor will vary from 3 to 5 cents per tree when a 

 large power outfit is used, and from 1 5 to 2 5 cents per tree when a 

 small barrel pump throws the liquid. 



The following is a reasonable estimate of the cost of spraying 

 1 00 trees : 



Cost of material $6.60 



Cost of labor 6.60 



Interest and wear on machinery 5.20 



$ 1 840 



This means a trifle over 18 cents per tree. The returns are 

 practically certain to justify this expenditure many times over. 



