New York AGRICULTURAL EXPERIMENT STATION. ~ 323 
lateness of the applications. Apple buds are more difficult to 
cover satisfactorily than pear buds. Besides at the time of treat- 
ment, the mites were active, and though none were discovered, it 
is quite probable that many were in the unfolded leaves, where they 
would be beyond the reach of the mixtures. The spraying seemed 
to furnish a small amount of protection to the trees but not enough 
to make the work profitable. The results obtained indicated the 
necessity of fall or early spring treatment if the pest is to be 
effectively controlled. 
EXPERIMENTS OF 1900. 
Conditions— This year the applications were made earlier and 
special attention was given to the oil sprays. The same trees were 
used as in the previous experiment. On April 4, miscible oil, one 
part to twenty parts of water, kerosene emulsion, one part to eight 
parts of water, and whale-oil soap at the rate of one pound of 
soap to seven gallons of water, were each applied to four trees 
respectively. Pure kerosene oil was used on four trees. All the 
trees receiving treatment were drenched with the sprays. Five 
trees, similarly infested with the mite, were used as checks. ‘The 
buds at this time were dormant. For purposes of comparison, 
the remainder of the orchard was treated on April 20, fifty-one 
trees being sprayed with whale-oil soap, thirty-four trees with 
kerosene emulsion, and fifty-one trees with miscible oil, the mix- 
tures being used in the above strengths. The buds were well 
swollen. A short light rain followed the applications. 
Results— The operations in this orchard during this year gave 
the most satisfactory results of any of the various experiments 
undertaken to control the blister-mite upon apple trees. Derived 
as they are from a badly infested orchard of good size, the data 
obtained in this experiment have direct application to many 
orchards now infested with the mite. The results are briefly stated 
as follows: 
Miscible oil_—The trees that received the early treatment were, 
throughout the summer, quite free of mite work, and the slight in- 
festation that was present was largely confined to widely separ- 
ated branches. The foliage was heavy, the trees having made a 
vigorous healthy growth. The three rows receiving the later ap- 
