EXPERIMENTS WITH WINTER WASHES AGAINST THE SAN JOSE 
SCALE, SEASON OF 1894-95. 
By C. L. Marlatt. 
A preliminary report on the winter treatment of the San Jose scale, 
as conducted by the Division of Entomology, was given by Mr. How- 
ard in a paper on this insect in the last number of Insect Life 
(pi). 293, 294). Additional experiments have since been made, and 
later notes made on the older ones, and the following detailed record of 
experiments and summary of results, with deductions bas^d on them, 
may be considered supplementary to the report referred to. The num- 
bers of the experiments in this article follow the actual order of their 
application, and do not correspond with the numbering in the first 
report, but they are similarly classified, and no difficulty will be experi- 
enced in referring from one to the other 
GENEKAL NOTES. 
History and condition of trees treated. — All the experiments were con- 
ducted iu the orchard of Mr. E. Dows, near Eiverside, Md. The 
orchard is chiefly of peach, with some apple trees intermixed, and origi- 
nally contained about 2,000 peach and 250 apple trees. A portion of 
the apple and peach stock was obtained from the Lovett Nurseries and 
planted in 1888. This was the source of infestation. The greater por- 
tion of the orchard was, however, obtained from a Virginia nursery 
in 1891, and was infested by the gradual spread of the scale from the 
Lovett stock. Experiments were conducted on both lots of trees, but 
for the most part on trees of or adjoining the original Lovett stock. 
The trees treated were all heavily infested with the scale, the worst 
infested trees being selected; and from this fact, as will be noted later, 
the death of certain trees, or portions of them, subsequent to treat- 
ment, is due, with two or three exceptions, rather than to the effect of 
the washes. 
Dates of, and conditions following treatment. — The applications were 
made at four different times, as follows: 
The first series was made on October 25 and 26, 1894, and comprised 
experiments 1 to 5. The trees at this time were still in leaf, but the 
foliage was mature and ready to fall. 
The second series was made November 17, and included experiments 
G to 9. Subsequent to these applications (series 1 and 2) the weather 
conditions were very favorable, no rains occurring for some days, and 
in fact the months of October and November, 1894, were exception- 
ally dry. 
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