REPORT OF THE DEPARTMENT OF tENTO- 
MOLOGY. 
CONTROL OF SCALE IN OLD APPLE ORCHARDS.* 
P. J. PARROTT, H. E. HODGKISS ann W. J. SCHOENE. 
SUMMARY. 
(1) This bulletin deals with experiments in old apple orchards 
to control the San José scale. Its purpose is to show the progress 
of the work and the relative cost of treatment by the more efficient 
remedies; and, as far as present knowledge permits, to suggest 
methods of affording suitable protection to fruit trees. 
(2) The experiments are being conducted at Youngstown in 
Niagara County, Geneva in Ontario County, and Yorktown in 
Westchester County. Standard remedies are employed for the 
treatment of the main portions of the orchards, and comparative 
tests are made of. the more promising sprays of recent introduction. 
(3) The orchard at Youngstown comprises 20 acres of leading 
commercial varieties and the trees are 47 years of age. Scale has 
been present 7 years. There has been more or less spotting of the 
fruit. With slight exceptions, clean crops were harvested in 1907 
from trees sprayed with sulphur washes and oil emulsions. Mis- 
cible oil protected trees from important injuries, but where spotting 
of fruit occurred the blemishes were usually more conspicuous than 
on trees treated with other remedies. 
(4) The orchard at Yorktown consists of 20 acres and the trees 
are from 33 to 50 years of age. Scale has been present since 1900 
and has been satisfactorily held in check by thorough applications 
of sulphur washes. The results in 1907 were almost perfect. The 
*A reprint of Bulletin No. 206. 
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