324 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
The block sprayed with miscible oil was the least satisfactory of 
any. The trees sprayed with sulphur wash once, with a supple- 
mentary treatment with home-made oil emulsions, produced fruit 
that was practicaly exempt from spotting by the scale. The re- 
sults in detail are described in the following paragraphs: 
Home-made oil-emulsions— As stated above, this spray gave 
most satisfactory results, and rows I0, II and 12, receiving a sup- 
plementary treatment, showed no improvement with respect to the 
scale by the additional application, as the first spraying had con- 
trolled this pest. 
Proprietary miscible oil.— The results attending the application 
of this oil in this orchard were very disappointing, especially be- 
cause, in some of the other experiments, almost perfect results 
were obtained by this spray when used in exactly the same propor- 
tions. The spray, when prepared, indicated that the emulsion was 
stable, and in the field work efforts were made to thoroughly wet 
all of the bark of the trees as was done with the other sprays. The 
trees were dry and they were sprayed from two sides until the 
bark commenced to drip. The first spotting of the fruit in this 
orchard this season was found in the block sprayed with this oil, 
and at the time of harvest nearly every tree had its crop more or 
less spotted by the scale. There was very little improvement in 
this respect by the supplementary treatment. 
Sulphur washes— In the southwestern portion of the orchard 
a small number of trees showed more or less spotted fruit, but with 
this exception the trees were, as a rule, free from spotting by the 
scale. Now and then a tree would have a few apples with one or 
more spots, but the main portion of the crop was clean. The trees 
receiving an application of the sulphur wash and a light supple- 
mentary treatment with oil emulsion were generally free from 
fruit-spotting and, when judged by the size and condition of the 
crop and the appearance of the foliage, constituted the most satis- 
factory block in the orchard. 
DISCUSSION OF RESULTS. 
The control of the scale in this orchard has been more difficult 
than has usually obtained in the co-operative experiments upon this 
problem. The principal reasons are that the scale was well estab- 
lished and had encrusted many trees before the treatment of the 
entire orchard was practiced, and that it was necessary to train 
competent men to perform the requisite spraying for the scale. The 
