38 BULLETIN 866, TJ. S. DEPARTMENT OF AGRICULTURE. 
Table 12.— Effect of various sprays on rot and yield of cranberries {New -* 
Plat No. 
Spray used. 
Copper 
sul- 
phate in 
spray 
used. 
Total yield. 
Yield per acre 
(calculated). 
All 
berries. 
Rotten berries. 
All 
berries. 
Sound 
berries. 
1917. 
1 
Pickering (A) 
Per ct. 
0.32 
.40 
.54 
.62 
1.00 
.64 
.64 
Pounds. 
W 
55| 
53| 
50} 
73f 
59| 
m 
19| 
54| 
68J 
41| 
80! 
107} 
94! 
38 
74i 
591- 
64i 
Pounds. 
w 
A 
5 
6} 
13 
20| 
20J 
26J 
12 
5f 
8} 
Perct. 
4.8 
6.5 
5.4 
5.8 
5.6 
4.4 
5.1 
12.0 
4.2 
2.8 
11.9 
7.3 
15.1 
16.1 
19.1 
20.8 
69.7 
16.2 
9.7 
12.8 
Bushels. 
Bushels. 
80 
2 
Pickering (C) 
66} 
3 
do 
66 
4 
Pickering (A) 
62? 
5 
Bordeaux , 4-3-50 
59| 
88J 
6 
Bordeaux, 2J-1J-50 
Bordeaux, 2^-2^-50. . 
70| 
86} 
8 (check) . . 
A 
Pickering (A) 
.6 
1.00 
1.00 
1.00 
B 
Bordeaux, 4-3-50 
1918. 
1 .. 
Sal soda and rosin-fish-oil soap, 4-5- 
50. 
Sal soda and fish-oil emulsion, 4-5- 
50. 
136f 
171i 
207! 
2011 
268 
235! 
190. 
185! 
148f 
161 i 
120! 
158! 
176} 
2 
3 (check) . . 
4 
Barium water and rosin-fish-oil soap. 
Pickering (C) and rosin-fish-oil soap. 
Pickering (A) and rosin-fish-oil soap. 
.6 
.6 
.6 
168f 
5 
216f 
184} 
57! 
6 
7 (check) . . 
8 
Bordeaux, 4-3-50, and rosin-fish-oil 
Bordeaux, 4-2-50, and rosin-fish-oil 
soap. 
Bordeaux, 4-1-50, and rosin-fish-oil 
soap. 
1.00 
1.00 
1.00 
155! 
134} 
9 
10 
140! 
1 All the cranberries tested were of the Centennial variety, except those on plats A and B, which were 
Early Black. 
The percentage of rot found on the berries from all of the sprayed 
plats (Table 12) was so small that it was impossible to differentiate 
between the sprays with respect to their fungicidal value. The 
check plat showed but 12 per cent of rot. The Bordeaux, 2^-l|-50, 
spray gave the best results for control of rot, but all of the other 
sprays were almost as good. On the large plats (A and B) 4.2 per 
cent of rot was found for berries treated with the spray resembling 
a Pickering spray and 2.8 per cent for those treated with Bordeaux. 
While the data favor the standard Bordeaux spray, the figures are 
small. 
Two large plats (A and B) of Early Blacks were sprayed with a 
power sprayer, one receiving Bordeaux, 4-3-50, the regular spray 
used on cranberries at Hanover Farms, and the other a spray resem- 
bling a Pickering spray of 0.6 per cent copper sulphate content, made 
by dissolving in water an amount of lime paste calculated from titra- 
tions to be sufficient to combine with the copper sulphate used. The 
results thus obtained are not comparable with those obtained from 
plats 1 to 8 (Table 12). 
IN 1918. 
Ten small plats of Centennial berries at Hanover Farms, N. J., were 
sprayed with a barrel-pump sprayer on June 11 (three or four days 
