16 LIME-SULPHUR MIXTURES FOR SUMMER SPRAYING. 
(1-25), and Bordeaux mixture in the control of apple scab, an experi- 
ment was undertaken in a block of Winesap apples at Bentonville, 
Ark. The trees were sprayed when about two-thirds of the petals 
were down. Paris green at the rate of 6 ounces to 50 gallons was 
used in all the mixtures. Owing to heavy rains during the blooming 
period and a freeze some days later, only a few scattering fruits on 
each tree survived, and the experiment was therefore discontinued. 
However, notes made on August 5 showed that the spraying had pre- 
vented the scab to a considerable extent. Practically all the fruit on 
the unsprayed trees was badly scabbed, dwarfed, and cracked, while 
most of the fruit on the sprayed trees appeared to be either free from 
the disease or only slightly affected. Had the fruit been picked and 
sorted a large percentage of it would doubtless have shown one or 
more scab spots, only one application having been made. 
Very little difference could be observed in the results of the treat- 
ment with the different mixtures. Bordeaux mixture appeared to 
rank first in efficiency,. factory-boiled ime-sulphur solution second, 
and the self-boiled mixture third, but this was merely estimated and 
can not be considered accurate. 
A similar experiment was conducted at Tecumseh, Nebr., on a block 
of very large Winesap trees. Here, again, the weather conditions 
were unfavorable. Rains interfered with the timely applications of 
the mixtures and a freeze killed a considerable percentage of the crop. 
The object of this experiment was to determine the relative efficiency 
of Bordeaux mixture, self-boiled lime-sulphur mixture, and factory- 
boiled lime-sulphur solution in the control of apple scab. The plots, 
consisting of 6 trees each, were sprayed shortly before the trees 
bloomed (April 18), as soon as the petals were shed (May 7), and 
three weeks later (May 30). For the control of the codling moth 
Paris green was used at the rate of 6 ounces to each 50 gallons of the 
mixtures, and all of the plots were sprayed again on August 3, only 
arsenate of lead and lime, 2 pounds each to 50 gallons of water, being 
used. 
With the exception of one lot, which was not properly prepared, 
the self-boiled lime-sulphur mixture did no damage to the foliage 
and did not russet the fruit. In the first application of factory- 
boiled lime-sulphur solution a strength of 1 gallon of the solution to 
20 gallons of water was used, and the young leaves were quite badly 
scorched. In the succeeding applications a strength of 1 to 25 was 
used and very little injury resulted—only a light scorching of the 
leaves around the margin. Bordeaux mixture russeted the fruit con- 
siderably, but produced very little leaf injury. The Winesap is not 
so seriously subject to spray injury as some other varieties, but the 
russet caused by the Bordeaux mixture was quite noticeable, while 
the sulphur preparations produced no perceptible injury. 
[Cir. 27] 
