26 SPRAYING PEACHES, 
In the sprayed block 8,223 fruits were obtained, of which 834, or 
10.15 per cent, were infested. From the unsprayed block there was 
a total of 7,158 fruits, of which 3,088 were infested, the percentage of 
sound fruit being 56.85, a gain in yield of 33 per cent of fruit free 
from curculio infestation. 
EXPERIMENTS IN WEST VIRGINIA, 1910. 
In order to demonstrate the control of peach scab and to deter- 
mine how much spraying is required on late varieties, an experiment 
was conducted in the orchard of L. P. Miller & Bros., at Okonoko, 
W. Va., during 1910. There are about 600 acres of 12-year-old 
trees in this orchard, and it is composed of a large number of varieties, 
beginning with Southern Early and ending with Bilyeu. Until 
summer spraying was undertaken in 1908 the peach scab had been 
most disastrous to the crops in this orchard, about one-half of the 
fruit being lost every year. Spraying, however, largely overcame 
the trouble, and in 1910 the loss was comparatively small, notwith- 
standing the difficulty of thoroughly spraying such a large orchard 
at the proper time. 
The spraying experiments were confined to the Elberta, Salway, 
and Bilyeu, and about 500 trees each of these varieties were used. 
The Bilyeu set a good crop, while the crop of Elberta and Salway was 
only medium to light, but ample for an experiment. For the most 
part the weather was unfavorable for good work. During the time 
the first and second applications were being made it was cloudy and 
showery and the day following the second application it rained rather 
hard all day. The Elberta trees were sprayed according to the 
following plan: 
Plat 1.—Self-boiled lime-sulphur and arsenate of lead, one month after petals 
fell, May 11. 
Plat 2.—Self-boiled lime-sulphur with arsenate of lead, one month after petals 
fell, and self-boiled lime-sulphur alone, one month later, May 11 and June 15. 
Plat 3.—Self-boiled lime-sulphur, one month after petals fell and one month lass 
May 11 and June 15. 
Plat 5.—Self-boiled lime-sulphur six weeks after petals fell and one month later, 
May 26 and June 28. 
Plat 6.—Commercial lime-sulphur, 1 to 100 with arsenate of lead and lime, one 
month after petals fell, and with lime only one month later. 
Plat 0.—Check; untreated. 
At picking time, August 22 to 26, the crop, including windfalls, 
from four trees in each sprayed plat and six unsprayed trees was 
sorted to determine the percentage of fruit affected with scab and the 
percentage of merchantable fruit. The results are shown in Table VII. 
440 
