92 Nebraska Agricultural Exp. Station, Research Bui. 10 
Table 59 shows the cost of spraying with Bordeaux as well as a 
comparison of the mist and penetration methods of spraying. 
Little difference is shown between the actual cost of spraying 
with Bordeaux and with lime sulphur as indicated by the tables. 
The cost of material for the former is somewhat less; but the ad- 
ditional labor of making it brings the cost up equal to that of lime 
sulphur. 
RESULTS OF SPRAYING BASED ON COMMERCIAL RETURNS 
It is impossible to make a fair comparison of commercial re- 
turns from spraying in widely separated orchards, in the treat- 
ment of which the only thing in common is spraying. For 
instance, the percentage of fruit free from insect or fungous 
injury may be higher in a sod orchard than in an orchard under 
cultivation, but when the fruit is graded the returns from the 
cultivated orchards are larger because the individual apples are 
larger. Again, a well-pruned orchard may show higher returns 
when the fruit is graded than an unpruned orchard in spite of the 
fact that the number of sound apples in the latter is much greater. 
As in the first instance, the size of the individual apples is the 
determining factor. In table 59, commercial grades of the 
sprayed plats are compared with commercial grades from check 
trees in the same orchard. No attempt is made to compare the 
results from the different orchards. 
