196 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
II, 7.1; Section III, 15.8; and from Section IV, 1.4. As the 
orchard has in the past been carefully sprayed the proportion of 
wormy fruit is low, as would be expected. The sound fruit 
from trees treated with bordeaux-arsenical mixture averaged 98.6 
per ct. as compared with 75.1 per ct. of sound fruit from trees 
treated with the sulphur wash. Thus there was, upon the trees 
treated with the bordeaux-arsenical mixture, 23.5 per ct. less 
wormy apples than upon the trees sprayed with the sulphur 
wash. The percentage of wormy apples from trees sprayed with 
the sulphur wash is higher than that of the ehecks. This dif- 
ference is undoubtedly due to the variation of individual trees 
in the amount of infestation, irrespective of the treatment; for 
it is clearly evident from the results obtained with the sulphur 
wash in this and other orchards that this treatment gives no pro- 
tection to the fruit from the codling moth. The same explana- 
tion may be given for the results obtained from the trees in Sec- 
tion II, which were treated once with the sulphur wash and 
twice with the bordeaux-arsenical mixtures, in comparison with 
Section III, treated entirely with the bordeaux-arsenical mix- 
tures. The difference in the results of these two sections seems 
to be due to the variation of individual trees in the amount of 
the infestation of the fruit rather than to differences in treat- 
ment. 
The superior results from the bordeaux-arsenical mixture are 
not surprising, when one considers the habits of the codling 
moth. If the infestation had been greater, more marked con- 
trasts in the results of the two sprays would have been expected. 
It seems to be clearly indicated by the experiments that an 
arsenical spray must be depended upon for the control of the 
codling moth. The effects of applications of a sulphur wash upon 
the hibernating larve were not determined. 
Experiments at Carlton Station.—This orchard consists almost 
entirely of the variety Baldwin. The trees are about thirty years 
of age, and have been somewhat neglected with respect to treat- 
ment with spraying mixtures. In this experiment 165 trees were 
used. With the exception of five trees reserved for checks, this 
number was divided evenly for treatment as outlined in the 
preceding experiment. On October 20-22 a count was made to 
determine the effects of the treatments upon the codling moth. 
