326 REpoRT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
dies and for various experiments with the sulphur washes, having 
been employed for these purposes since 1901 and up to the present 
time. On account of the nature of the experiments, it has been 
necessary to leave checks or unsprayed trees, so that in no one year 
has the scale been entirely under control; for while it was being 
-checked in one part, it was allowed to breed in another, according 
to the treatment. In 1906, the experiments were changed and the 
entire orchard is now sprayed with one or more of the standard 
remedies. Mr. White has orchards of other fruits and has been 
very successful in controlling the scale. No difficulty was experi- 
enced in raising crops of plums, pears and apples entirely free of 
scale, but in the portion of the old apple orchard given to the ex- 
eriments there has of necessity been more or less spotting of the 
fruit. Even here, when the trees have been well sprayed and are 
removed from the checks, clean crops have usually been harvested. 
The self-boiled lime-sulphur-caustic soda wash has been used for 
the treatment of the various orchards, and the cost of spraying the 
apple orchard was about 24 cts. per tree for all sizes. 
DESCRIPTION AND COST OF SPRAYING PLANT. 
A hand-power outfit was used, with two leads of hose with two 
nozzles each. The truck has no tower. A light maple pole with 
40 feet of hose attached was used to spray the top part of the 
trees; the lower parts of the trees were sprayed, using a 6-foot 
pole with 20 feet of hose attached. The cooking plant consists of 
a 6-horse-power boiler and one tank of 160 gallon capacity. 
GeTe Re DOT Chao. pee oe ake Selbis doit well ee ee ta, ee ae $25 00 
Star Pipes and Mittin ods oe cs os v teeilnae ae net eee tena ee 5 00 
160-gallon® boiling ate ory ey Soy Ses On el eee eee 2 00 
Gould’s:Sentinel pump sicsvew Li aha Cottaed: woeneeinteee ee 40 00 
Spray. tank Chometmade) cits co etiens soe cee tetas 0 een 10 00 
Wagon *tiuck 24)4.....4s-0f-) GALS Se es | ee 35 00 
In. 1907 a comparative test was undertaken of the boiled lime- 
sulphur wash and miscible oil, the applications being made on adja- 
cent rows of trees which were thirty-three years of age. The items 
of expense and the cost of spraying the apple trees are as follows: 
