New York AGRICULTURAL EXPERIMENT STATION. 295 
tion of a sulphur wash was usually more effective than one applica- 
tion of a miscible oil in either of these proportions. Jn one test 
Kil-o-Scale at the rate of one part to twenty parts of water proved 
more effective than a mixture of Scalecide in the same proportions, 
but on the whole there was very little difference in the relative 
effectiveness of these sprays when the amount of dilution was the 
same. Surekill applied as recommended had no appreciable effects 
upon the scales. 
CONCLUSIONS: 
Applications of proprietary miscible oils at the rate of one part 
of oil to twenty or twenty-five parts of water, as recommended in 
the printed directions, did not give uniform results on the scale. 
Trees sprayed with these strengths in the fall or in the spring 
usually showed more or less spotting of the fruit and varying 
infestation of the new growth. Ordinarily not enough scale was 
destroyed by the miscible oils, in these proportions, to warrant a 
fruit-grower taking chances on the trees, unless supplementary sum- 
mer or fall treatments are to be made. The treatments were usually 
much more effective on trees that were slightly infested than on 
those showing incrustation of the scale. Surekill was the least 
efficient of the miscible oils that were tested. 
Applications of a miscible oil in the spring at the rate of one part 
of oil to ten or fifteen parts water, while uniformly more destruc- 
tive to the scale than the weaker preparations, were usually not 
quite so effective as the sulphur washes. Preparations of miscible 
oils in these proportions killed enough of the scale to maintain the 
vigor of the trees and to secure fairly clean fruit yields. 
DIRECTIONS. bORe USING MISCIBLE OILS. 
On the basis of these experiments it is evident that the miscible 
oils tested must be used stronger than is recommended by their 
compounders to obtain satisfactory results on the scale. There- 
fore instead of using one part of oil to twenty or twenty-five parts 
_ of water the orchardist is advised to use at least one part of the 
miscible oil to ten or fifteen parts of water. Before measuring out 
the required quantity from its container, vigorously stir or shake 
