326 Report or THE DEPARTMENT OF ENTOMOLOGY OF THE 
for orchardists in the treatment of the mite. One application of 
the emulsion has controlled the mite on pear trees and has reduced 
the numbers of the mites on apple trees by one-half. It is besides 
a cheap and safe spray and for these reasons is better adapted to 
the needs of average fruit growers. If the infestation is severe, 
two sprayings with the emulsion are advised, one in the late fall 
and one in the early spring, during the period of November to 
March inclusive. If only one application is intended, this should 
be made in the fall if possible. Miscible oil gave very satisfactory 
results, and for use should be diluted with fifteen to twenty parts 
of water. Proprietary remedies are often variable in their insecti- 
cidal qualities, and one employing them should be fully alive to 
their limitations in this respect. The results obtained in these ex- 
periments suggest the following directions for the treatment of 
mite-infested apple and pear orchards respectively. 
DIRECTIONS FOR COMBATING THE MITE. 
On apple trees— Spray the trees with kerosene emulsion diluted 
with five parts of water, the applications being made during the 
months of October, November, March or April. If possible, two 
sprayings should be made, one in the fall and one in the spring, as 
many mites are liable to escape with only one treatment. If it is 
not practicable to make more than one application, apply the mix- 
ture in the fall as soon as possible after the majority of the leaves 
have fallen, as many of the mites are still in the pubescence of 
the young wood, where they are more easily destroyed than under 
the bud scales. Special pains should be taken in the treatment 
of apple trees to wet the buds and the new growth thoroughly with 
the emulsion. Nothing less than a thorough drenching of the buds 
will give satisfactory results. The rough bark of the limbs and 
trunks may be neglected as they afford no protection to the mites. 
Miscible oil diluted with ten to fifteen parts of water may be 
used in place of the kerosene emulsion. Pure kerosene oil and 
crude petroleum are advised only when other sprays have failed. 
In using them they should be applied with the wind as a fine mist, 
spraying ceasing as soon as the oil commences to run on the bark. 
