New YorK AGRICULTURAL EXPERIMENT STATION. 319, 
The Spitzenburgs and Baldwins in rows 7-12,* inclusive, were prac- 
tically clean. The Greenings, rows 1-6,* with the exception of two 
trees, were much more free of the scales than in 1904, and on the 
whole produced a clean crop. The worst infested part of the or- 
chard had now changed, as a result of the treatment, from the ex- 
treme eastern side, and now extended along the ditch which runs 
irregularly through the orchard between rows 14-17, and into the 
northern part of rows 21-25. The scale was kept well under con- 
trol in the eastern one-half, where it had originally been very de- 
structive. Of the trees that received the treatment with crude oil, 
in 1905, there were five that still appeared unthrifty, the application 
having apparently aggravated the injuries by scale and collar rot. 
It should also be stated in this connection, that in the contest with 
the scale up to this time, no special difficulty has been experienced 
in preventing important injuries to the trees. Although the pest 
had been established in the orchard for six years, no trees have suc- 
cumbed to its attacks. Of as much importance as the scale in the 
marketing of the crop has been the codling moth, which was re- 
sponsible for many wormy apples. The control of this insect was 
not a part of the experiment. 
DETAILS OF CO-OPERATIVE EXPERIMENT IN 1907. 
In 1907, a comparative test was made of a home-made oil emul- 
sion, containing 20 per ct. of crude oil, a proprietary miscible oil, 
and the boiled lime-sulphur wash. The oil emulsion was made after 
the standard formula and was applied to rows 7-12, inclusive. Fol- 
lowing this treatment, a supplementary application, containing 16 
per ct. oil, was applied to rows 10-12, inclusive. Miscible oil was 
used at the strength of one part to ten parts of water, for the treat- 
ment of rows 13-18, inclusive, and a supplementary application, 
at the same strength was made to rows 15-18, inclusive. The sul- 
phur wash was applied to rows 1-6, inclusive, and rows 19-28, in- 
clusive. Supplementary applications of oil emulsions, containing 
20 per ct. kerosene or 16 per ct. crude oil, were made on portions 
of rows 19-28. The supplementary sprays were largely directed 
to the tips of the small branches and twigs to reach the scales pro- 
tected by pubescence. All of the applications were made in the 
*See chart, Plate XXXI. 
