354 CONTROLLING INSECTS AND DISEASES 



Hudson Valley. It was figured that each spray cost an 

 average of 28 cents per tree for trees 28 years of age and over, 

 and an average of 9 cents per tree for trees of less age. 



These figures include the cost of the spray material, the 

 cost of labor, sprayer cost, upkeep, depreciation, and the power 

 for drawing the outfit. It has been shown that the New York 

 orchards sprayed most often and most thoroughly had yields 

 of marketable apples sufficiently high to keep production costs 

 down to an average of 73 cents per bushel. Of this cost about 

 25 cents was for spraying (see Table 43). 



TABLE 43 



Cost of Producing Apples According to Number of Sprays and 

 Amount of Spray Applied per Tree per Application, Western 

 New York and Hudson Valley 



Cornell Extension Bulletin 355 



Cost per Bushel 

 J Light appHcations } p /. /9 



Less than 



5 sprays | jj^^^^y applications | JjS A O'^ 



5 or more 

 sprays 



Light appHcations I J^Q.S^ ~1 



Heavy applications 



This emphasizes that few sprays and light applications may 

 be expensive, whereas more numerous sprays and heavier ap- 

 plications may, by increasing the marketable product, be 

 economical. 



The cost for material, labor, power for pulling the outfit, 

 the use of the sprayer, preparing and applying the material, 

 for 80 fruit growers in Berrien County, Michigan, for 11 ap- 

 plications in 1935 was $27.16 per acre, 12 cents per bushel of 

 fruit harvested, or 55 cents per tree. Most of the trees were 

 between 15 and 30 years of age. Where trees were less than 



