310 REPORT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
miscible oil was generally not so efficient in preventing the spotting 
of the apples. 
(5) The Geneva orchard comprises 16 acres and the trees are 
from 30 to 50 years of age. Scale has been in the orchard for 5 
years and, with the exception of 1906, has been successfully com- 
bated. In 1907, applications of sulplur washes, oil emulsions and 
miscible oil effectually controlled the scale. 
(6) The cost of treatment per tree is variable, depending on 
labor, machinery, size of trees, weather conditions, kind and cost of 
spraying supplies and fuel, and general management. 
(7) The average quantity of spray and cost of treatment per 
tree in these experiments, not including interest on investment and 
wear of machinery, are as follows: 
SPRAY TREATMENT FOR SCALE; QUANTITY APPLIED 
AND COST, PER TREE. 
NIAGARA COUNTY ORCHARD. 
Trees 47 years old. Machinery, power outfits. 
Number of Cost of 
gallons. Mo pte 
Sulphur wash, average for 1905-’6-’7........ 14 31h 
stl phuinwasheaverage. [or 1007-2 tems h ie 13 ae 
Sulphur wash, followed with crude oil emul- 
SIONS, }. di alhitceeds saetas cece geiens eee ee i 38 
Sulphur wash, followed with kerosene emul- 
SLOT echt ategle: BU es Sat cee eee CE eae Tey, 38 
Crude oil Laat 20 50eT Ch. sal) ate ere, II 3} 48 
Crude oil emulsion, with pe RRI TOS REAR treat- 
TROL iste nese sta Sn be Sas das egrets bee Us 15 54 
Miscible,oil, To per.ct at A0rcts. per Cale cou e 10 50 
Miscible oil, with supplementary treatment.... 13 69 
Miscible oil, 10 per ct., at 50 cts. per gal...... IO 59 
Miscible oil, with supplementary treatment. 13 83 
Cride toil ei oe Boe GN nese eee a 5 58 
Kerosene lime. wash, 25, pér.ct. oil ..b at 41 15 60 
