292. Report of THE DEPARTMENT OF ENTOMOLOGY OF THE 
Results on scale: Plums.— On June 17, 1906, active young scale 
insects were detected on all trees with the exception of the plums 
sprayed with the sulphur washes. The breeding of the scale con- 
tinued throughout the summer ; and by fall the worst infested trees 
that had received treatment with Scalecide and Kil-o-Scale had 
more scales than in the previous year. On the moderately infested 
trees the results with the miscible oil compared favorably with those 
obtained by the sulphur washes. 
Apples— On May 4 an examination of a number of branches 
showed that about one-half of the scales were alive on trees sprayed 
with Scalecide and Kil-o-Scale, the applications of these oils proving 
much less effective on apples than on plums. ‘There was also some 
spotting of the fruit by the scale on the trees sprayed with the 
sulphur washes but the blemishes were much less abundant and less 
conspicious than on the apples from the trees sprayed with the 
miscible oils. Two of the trees sprayed with Scalecide were so 
badly injured by the scale that the owner cut them down in the 
fall of 1906. 
ORCHARD II. 
In this orchard 14 apple trees of twelve years of age, 24 plum 
trees of eight years of age, 6 peach trees of five years of age, and 
2 cherry trees of five years of age, were sprayed with either Kil-o- 
Scale, Scalecide or Surekill, using one part of the miscible oil to 
either fifteen, twenty or twenty-five parts of water. The appli- 
cations were made on April 23, 1906. Every tree in this block was 
well infested and occasionally one was much incrusted. 
Results on scale-— On May 3 blossoming commenced which was 
normal for all trees with the exception of two plums and six peaches 
which showed much retardation of the fruit and leaf buds by the 
miscible oils. Three of the injured peaches died during the early 
summer. On June 22, a few young scales were found on plums 
sprayed with one part of Scalecide to twenty parts of water. Two 
peaches that were much incrusted with the scale in 1905 showed, 
as a result of the treatment with Scalecide at the rate of one part to 
fifteen parts of water, hardly any evidences of larval activity. 
During the summer these two trees produced much new growth 
which was free of scale throughout the season. All the apples, 
