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298 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
Nursery stock is commonly infested; and, when the mite is abun- 
dant, pear foliage is much discolored, and the young trees may be 
stunted through the destruction of the terminal leaves of the new 
growth. The appearance of the mite for successive years in the 
nursery is due to methods of budding. The experiments to control 
the mite in nurseries are not completed, but it is believed that the © 
pest can be eliminated from the nursery by the selection of buds 
from clean stock, and by the fumigation of budding sticks. 
In the experiments upon apple trees comparative tests have been 
made with kerosene oil, miscible oil, kerosene emulsion, whale oil 
soap and the sulphur washes; and of these sprays, kerosene either 
clear or emulsified, and the miscible oil, proved the most efficient 
remedies for the mite. Because of its safe qualities and cheapness, 
kerosene emulsion, diluted with five parts of water, applied during 
the dormant season, appears to be the most practical remedy for the 
spraying of apple orchards, when treatment is advisable. The mite 
may be efficiently controlled upon pear trees by careful pruning 
and by spraying during the late fall or early spring with kerosene 
emulsion, miscible oils or the sulphur washes. The mite is much 
more readily controlled upon pear trees than upon apple trees. 
