COST OF SPSATING 



47 



three men, each at $1 per daj'. The following table gives 

 the cost per acre of the material and labor for each of the 

 6 sprayings : — 



For potatoes " the items of expense of spraying 10.4 

 acres five times were as follows : — 



234 pounds copper sulphate at 7 cents 



195 pounds prepared lime at H cents 



90 quarts arsenite of soda solution at 23 cents 



70 hours labor for man and horse at 30 cents 



Wear on sprayer 



Total 



$16.38 

 2.92 

 2.10 



^21.00 

 6.50 



$48.90 



"The total expense of spraying was $4.70 per acre or 94 

 cents per acre for each application." ' 



According to Kinney ^ the cost of spraying apple trees 

 twice with combined Bordeaux mixture and Paris green, 

 and once with Bordeaux mixture, has been estimated as fol- 



' Stewart, F. C, and others, N. Y. (Geneva) Agr. Exp. Sta. Bui. 290, 

 p. 257. 



' Kinney, L. F., R. I. Agr. Exp. Sta. Bui. 31, p. 15. 



