46 Nebraska Agricultural Exp. Station, Research Bui. 10 
At Omaha (table 30), the schedules for plats 5, 6, and 7 were 
100 per cent efficient, with very little difference for the schedules 
of the other plats. The difference in amount of infection on some 
of these plats and on the check might be astonishing were it not 
known that the check plat was a row near a fence which could not 
be cultivated, while all of the sprayed plats had received clean 
cultivation for several years. Unless the slight difference in the 
efficiency of the different schedules be attributed to the natural 
variation to be expected or to experimental error, the evidence 
indicates early infection. 
The spray injury is quite uniform for the different schedules 
except that of plat 1. The high percentage of spray injury 
recorded here cannot be accounted for. 
At Lincoln (table 31), the evidence corroborates that of 
table 29 at Beatrice. The late secondary infection on the sprayed 
trees was heavier here than at Beatrice, tho the infection on the 
check trees was much lighter. This difference may be due in 
part to the fact that unsprayed orchards were on all sides of the 
plats used in the experiment, but is due in part, no doubt, to more 
efficient spraying at Beatrice. 
The omission of a different application in each of several 
schedules furnishes evidence of when much of the infection 
occurred. It certainly proved disastrous, here, to omit the 
cluster-bud spray or the fungicide at the petal-fall spray as is 
often advocated. The control shown by the 14-days and the 21- 
days applications indicates that considerable infection was also 
occurring at this time. 
