296 Reporv oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
fested and disfigured by the scale. The amount of infestation 
and size of trees especially fitted this orchard as a place to 
test the practicability of treating large trees for the scale. 
Checks.— The checks consisted of four apple trees of the same 
age and variety located in an adjoining lot.. Two were infested 
to about the same extent as the treated trees and the other two 
to a somewhat less degree. 
Conditions.— The trees were sprayed April 23-26. The weather 
was cloudy and very windy during nearly the entire time. On 
the 24th a heavy gale was blowing during the entire day, result- 
ing in much waste of material. During the evening of the 25th 
there was a heavy thunder shower of short duration and a light 
rain the following day. For all of the work in this orchard a 
barrel pump having two leads of hose was used and Seneca 
nozzles. 
The buds were farther advanced on these trees than in any 
orchard previously treated. In many cases the buds had already 
burst and in some cases the leaves were well out, while in others 
only the tips of the young leaves were beginning to appear. 
The method of treatment was the same as previously described, 
the trees being thoroughly sprayed once and retouched twice. 
Especial pains was taken to make the treatment thorough. Some 
of the worst infested branches were marked for final examina- 
tion. When the spraying was completed the trees had the ap- 
pearance of being whitewashed from the ground to the highest 
branches. Some idea of the thoroughness of the work is given 
in Plate XXXV, which is a view of a portion of the orchard 
soon after the spraying was finished. In Plate XXXVI a por- 
tion of one of the trees is shown. The picture was taken the 
same day that the tree was sprayed. 
The weather during the thirty days immediately following the 
treatment was usually cloudy with several days of rain as fol- 
jows: April 27 and 29, light rain; May 2, 4 and 5, light rain 
followed by a heavy rain on the 7th, lasting nearly all day; May 
8 and 12, light rain followed by heavy showers on the 18th; light 
rains on the 19th, 20th and 22d, with heavy showers on the 23d 
and 24th; and a heavy rain on the 25th, lasting all the afternoon 
