New York AGRICULTURAL EXPERIMENT STATION. 301 
free from attacks of the leaf curl. A few leaves in various other 
parts showed small diseased areas, but the infestation was not 
sufficient to destroy the leaves or cause them to drop prematurely. 
The unsprayed trees were much defoliated by the curl and were 
in an unthrifty condition as a result of the attacks of this disease 
for three successive years. 
Effect of sulphur sprays on trees.—A few Elbertas, which had 
made an advance growth at the time of spraying, showed a 
slight reduction in the amount of foliage. With this exception 
the appearance of the trees was normal. The setting of fruit 
upon the sprayed trees was 98 per ct. better than that of the 
unsprayed trees. But this difference largely disappeared with 
the June drop which resulted in an almost entire loss of the fruit 
upon all the trees in the various lots. 
ORCHARD II. (SUFFOLK COUNTY.) PEARS. 
This orchard is located about three miles from Riverhead, L. I. - 
It consists of 1380 Keiffer pear trees, which have been planted two 
years. These have been given careful cultivation but have not 
been sprayed until the present experiment was conducted. 
Conditions.—On April 8, twenty of the trees were sprayed with 
the self-boiled lime-sulphur-caustic soda wash, the remainder 
being reserved as checks. The precipitation for the next two 
weeks was as follows: April 9, rain, 1.32 inches; April 11, rain, 
115 inch; April 12, .285 inch; April 14, snow, .07 inch; April 
16, rain, .12 inch; April 20, rain, .025 inch. The total precipita- 
tion for the period was 1.98 inches. One application of the wash 
was made which, on account of the small size of the trees, was 
very thorough. 
Results on pear blister mite—On April 8, the leaves of the 
unsprayed trees were nearly all infested with blister mite while 
the sulphur-treated trees were apparently unaffected. By May 
16 there were a few leaves on four of the sprayed trees that 
showed slight traces of the mites, but the remaining sulphur- 
treated trees showed no evidence of infestation. About June 25 
the mites upon the unsprayed trees were migrating to the newer 
foliage while none were observed upon the sprayed trees. A 
careful examination on August 1 showed that there were eight 
trees in the sprayed lot that had traces of mite work while the 
checks were uniformly well infested. 
