Spraying Experiments in Nebraska 
57 
At Beatrice (table 35), Bordeaux proved only 11 per cent 
more efficient than lime sulphur. Since the 35-days spray pre- 
vented practically as much injury as either of the two preceding 
sprays, it would indicate that most of the infection did not take 
place until or after this time. 
Table 36 — Wymore spray schedule 
Date 
April 23 
May 14 
June 10 
July 12 
Spray 
Cluster-bud 
Petal-fall 
Three-weeks 
Second-brood 
Plat 1 
Bx-4-6-50 
Bx-3-4-50 
Bx-3-4-50 
Bx-3-4-50 
2 
LS-1.009 
LS-1 . 008 
LS-1. 008 
LS-1. 008 
Blotch ivjury on windfalls and picked fruit 
Variety 
Plat 
Total i 
fruit Blotch 
1 
Per cent 
blotch 
Spray 
injury 
Per cent 
spray 
injury 
Ben Davis j 
Mo. Pippin i 
1 
2 
ch^ck 
5,703 i 44 
5,603 292 
4,063 1 100 
.77 
5.21 
2.46 
180 
156 
3.16 
2.78 
At Wymore (table 36), Bordeaux again proved superior to 
lime sulphur in controlling blotch. There was considerable more 
blotch injury on the lime sulphur plat than on the check plat. 
The check plat was sprayed four times with Bordeaux in 1913. 
This may account for the lack of infection in 1914. 
The results of the work in 1914, while not conclusive, shed 
considerable light on the possibility, and methods, of controlling 
blotch. Considering the time when the first spores were liberated, 
if the proper weather conditions exist infection should begin about 
three weeks after the petals fall. The finding of some blotched 
fruit on July 8 at Lincoln and July 10 at Beatrice would also 
indicate that infection may occur earlier than was suggested by 
Scott and Rorer. Lewis (1913) also suggested that this was the 
case in Kansas. However, the fact that the 35-days spray was 
almost as efficient in controlling the disease as the 10-days or the 
25-days spray shows that most of the infection occurred not 
sooner than 5 weeks after the petals had fallen. As in 1913, 
Bordeaux proved more efficient than lime sulphur. 
EXPERIMENTS IN 1915 
The same general plans of procedure were followed as in 1914, 
except that the experiments for the control of blotch were confined 
{^JlSj Lewis, L). The control of apple blotch, ivansas S:a. Bui. 196. 
