8 BULLETIN 130, U. S. DEPARTMENT OF AGRICULTURE. 



efficiency of an outfit can be increased by the use of horses which are 

 accustomed to the hauling of a sprayer. Long distance from water 

 and spray materials causes the loss of considerable time, which could 

 often be remedied with practically little outlay. 



Figure 3 shows a spraying crew at work in the Wellman orchard. 



Table III gives a summary of the spraying costs per acre, per tree, 

 and per barrel of marketable fruit. In 1911 and in 1912 the orchard 

 was sprayed four times. The first spraying was done at the time the 

 fruit buds were showing a little green color, the second time when the 

 fruit buds were pink, the third after two-thirds of the petals had 



Fig. 3.— Power sprayer and crew. Two or three men are ordinarily used on the Wellman farm. 



fallen, and the fourth the latter part of July in 1911 and the first part 

 of August in 1912. If the same quantity of material were used and 

 the same care taken each year, the time required for the operation 

 would be nearly the same year after year. Referring to the first 

 spraying in 1911 and 1912 (Table III), the cost of spraying would 

 have been about the same if it had not been for the increased cost of 

 spray materials. It is true that there was an increase in the amount 

 of labor, due to the necessity of more thorough spraying for the 

 control of the green aphids, but had this not been required the costs 

 per acre of the 1911 and 1912 sprayings would have been approxi- 

 mately the same. 



