374 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
has been grown under the so-called sod-mulch method. This change 
seems to have been an unfortunate one; as the sod treatment, com- 
bined with the -blister-mite and two comparatively dry seasons, has 
told seriously on the health of the trees. 
The blister-mite did not attract the attention of the owner till 
1905, when the foliage of nearly all of the trees was generally con- 
spicuously spotted. During succeeding years the mites have con- 
tinued to be abundant, especially on Baldwins, and owing to the 
unsatisfactory condition of the orchard during 1907, a co-opera- 
tive experiment with this Station was undertaken this spring to 
demonstrate the value of the home-made concentrated lime-sulphur 
mixture for the control of the mite. The applications of this wash 
were made with a power sprayer during the week of April 5-11. 
At this date the buds were well swollen and were beginning to 
show green at the tips. The trees were thoroughly whitewashed 
by the one operation and no other treatments were made. The 
quantity of mixture used to each tree was seven gallons. A number 
of Baldwins were left unsprayed to serve as checks. 
Results on mite-—— The results of this treatment were among the 
most conclusive in the series of experiments. The difference in 
the conditions of the sprayed and unsprayed portions of the 
orchard was very striking. The foliage of the sulphur-treated 
trees was entirely free of mite injuries and made a very marked 
contrast with adjacent rows in the untreated parts of the orchard 
Not only were the leaves free from diseased areas, but they seemed 
On an average, to be somewhat larger than those on the unsprayed 
trees. This may have been mainly due to the absence of curling, 
one of the results of the attacks of the mite. The sprayed trees 
appeared to have made a better growth and, consequently, to carry 
a heavier foliage, but this difference was perhaps more apparent 
than real. The leaves of unsprayed trees in this community gen- 
erally showed very plain evidences of infestation with the blister- 
mite. 
ORCHARD III. 
This is the orchard of Wm. A. Lafler, Albion. It consists of 
17 acres, bearing 260 trees, 45 years of age and 323 trees, 35 years 
old. The older trees have been largely grown in sod, which has 
been heavily manured, while the younger planting has been under 
thorough cultivation. Both plantings have yielded well for the 
past twelve years. The leading varieties are Baldwin, Greening, 
Russet, Spy, King and Twenty Ounce. The orchard has been 
