New York AGRICULTURAL EXPERIMENT STATION. 315 
bark louse. Plants having areas of bark containing about 160 to 
180 old scales to the square inch were used. Portions of bark 
meeting these requirements were marked with pins. For the pur- 
pose of ascertaining the extent of the weathering of the scales 
several sections of infested wood had been obtained during the 
preceding November to serve as a basis to compare the conditions 
upon the selected plants with respect to the scale. On June 26 
an examination of the plants was made. The results of the treat- 
ments as shown by four sections of bark, each one inch square, 
from each of the treated and untreated plants, are as follows: 
TABLE X.—EFFECT OF SULPHUR WASH UPON DoGwoop BARK LOUSE. 
TREATMENT. Scales June 26. | Reduction | Increase 
No. Per ct. Per ct. 
PSR WOR res fos sre sicies » vicle cS a hho oes ss ; me cant es oo ! 50 0 
Ch k 684 olddssesa% 
REMCPIRSICIS) pitgk s Sed p cccteret c.sielet x da vlereracd 6 trelbe 421 young... 9 46.5 
Gimme niaitiees ccd. .2>. Aeae. atid... es oer Le t 20.7 110.3 
Check—fall conditions—basis for comparison.| 754 old........ 
Comparative tests of sulphur washes.—As announced in Bul- 
letin 254 comparative tests of various sulphur washes were 
conducted this spring in the same manner as the fall experiments. 
Some interesting results were obtained by the different washes 
upon the trees and the scale, but as the work contributed only a 
little light upon the question of the best formula to employ, it is 
unnecessary to discuss the experiments in detail. For the pres- 
ent, preference is given to the boiled lime-sulphur wash, but where 
there are not the conveniences at hand for the preparation of the 
wash by external heat then the self-boiled lime-sulphur-caustic 
soda wash is advised. 
ORCHARD VII. (ORLEANS CO.) APPLES, 
This orchard is adjacent to Carlton Station and consists almost 
entirely of the variety Baldwin. The trees vary from 30 to 50 
years of age and have been in the past somewhat neglected with 
respect to cultivation and treatment with spraying mixtures. 
In this experiment 56 trees were sprayed with the sulphur washes 
and 146 were divided evenly for the remaining treatments. 
The scale was well distributed throughout the orchard, and a 
