188 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
Comparative tests of the sulphur wash and the bordeaux- 
arsenical mixtures for the control of the codling moth demon- 
strated that the latter treatment is more effective. The average 
percentage of wormy apples from the trees treated with the 
bordeaux-arsenical mixtures is 15.3 per ct., and from the trees 
spayed with lime-sulphur-soda wash 386.7 per ct., showing that 
there were 21.4 per ct. less wormy apples upon the trees sprayed 
with the bordeaux-arsenical mixtures. No data were obtained 
upon the effects of applications of sulphur wash upon the 
hibernating larve. 
Because of the absence of peach leaf curl, apple scab and other — 
diseases in the experimental orchards no results were obtained 
as to the value of the sulphur wash for these diseases. Future 
experiments are necessary to determine the value of this treat- 
ment for these and other orchard diseases, and to what extent 
it may be employed in place of the usual applications of the 
bordeaux-arsenical mixtures. 
INTRODUCTION. 
One of the significant results of the lime-sulphur-salt experi- 
ments, conducted in 1902 by this Station, was that the apples 
upon the sprayed trees in the Stevenson* orchard were practi- 
cally free from scab while those of the checks were badly affected, 
The only satisfactory explanation for the superior condition of 
the fruit of the former was that the applications of the sulphur 
wash during the dormant season had prevented scab attack. In 
other experiments it had been conclusively demonstrated that 
Similar treatment had efficiently controlled both scale and peach 
leaf curl. 
From these results it was clearly apparent that the sulphur 
sprays have considerable fungicidal value and therefore have a 
greater range of usefulness and were more efficient in the East 
than had heretofore been suspected. But to what degree these 
sprays can be profitably used in eastern orchards, aside from the 
treatment of scale and leaf curl, has not been determined. 
In view of this fact that it was considered desirable to under- 
take investigations to ascertain to what extent treatment with a 
sulphur wash during the dormant season could be depended 
*Bulletin 228 of this Station, p. 405. 
