376 



JOURNAL OF ECONOMIC ENTOMOLOGY 



Cost of Spraying Orchard in 1913 



[Vol. 9 



Time of Application 



May 4 



May 14 



Aug. 14 



Total 



Cost 



Gallons of spray material 



Man, hours 



Horse, hours 



Equipment, hours 



1,400 

 43.5 



26 

 20 



6,000 

 116.5 

 73 

 73 



2,200 

 86 



84 

 84 



i,600 

 246 

 183 

 183 



$60.80 

 49.20 



23.79 

 20.05 



$153.84 



In 1913 the crop was 1,183 barrels. The spray materials consisted 

 of lime-sulfur and arsenate of lead. 



Cost of Spraying Orchard in 1914 



Time of Application 



May 19 



May 26 



Aug. 1. 



Total 



Cost 



Gallons spray material 



Man, hours 



Horse, hours , 



Equipment, hours. . . . 



3,000 

 85 

 47 



47 



4,000 



11,000 

 274 

 157 

 157 



864.80 

 54.80 

 20.41 

 18.06 



8158.07 



In 1914 the crop was 1,653 barrels. The spray material used con- 

 sisted of lime-sulfur and arsenate of lead. 



Cost of Dusting Orchard in 1915 



In 1915 the crop was 885 barrels. The dust mixture used consisted 

 of 90 per cent finely ground sulfur and 10 per cent arsenate of lead. 



From the above tables it will be seen that the cost of dusting the 

 orchard in 1915 was $47.74 less than the cost of spraying it in 1913, and 

 $51.97 less than spraying it in 1914. 



In 1915 the whole orchard was dusted and there was no opportunity 

 of comparing the relative efficiency of the different methods of applying 

 the materials. Extensive observations as to the relative efficiency of 

 dusting and spraying have been published in bulletins 340, 354, and 

 369 of the Cornell University Agricultural Experiment Station. 



