New York AGRICULTURAL EXPERIMENT STATION. 325 
SPRAYING FOR THE SAN JOSE SCALE.* 
H. E. Hopexiss, F. A. SigRINE AND EH. L. BAKER. 
SUMMARY. 
This bulletin contains the results of the past year’s experiments 
to determine the effects of a number of spray mixtures upon the 
San Jose scale and fruit trees. In this work various sulphur 
washes, the kerosene-lime mixture and soluble oil sprays have 
been used. Applications of these have been made at intervals 
during the early spring, summer and fall. 
The fall applications of the sulphur washes gave, on the whole, 
satisfactory results. In several instances peaches and plums sus- 
tained more or less injury. The treatment upon San Jose scale 
was generally effective. 
The kerosene-lime mixtures have proven rather unsatisfactory, 
for the applications often gave variable results upon the scale and 
the trees. Comparative tests with several grades of lime indicated 
that Limoid made. the more stable emulsion. Analysis of several 
preparations of the kerosene-lime mixture showed that the larger 
percentage of the oil did not settle with the lime but rose to the 
surface in an emulsion with the lime. The variable results upon 
trees and scale were due to the imperfect distribution of this 
emulsified portion in the mixture. 
Some tests were made with a soluble oil spray known as Scale- 
cide. Although this gave some satisfactory results on scale, 
further experiments are necessary to determine its merits for the 
treatment of commercial orchards. 
INTRODUCTION. 
The experiments upon the use of various spraying mixtures for 
the treatment of orchards were continued during the past year. 
The object of the investigations was to determine the effect of 
these sprays on the San Jose scale and on fruit trees. Past ex- 
- *A reprint of Bulletin No. 273. 
