THE BLACKHEAD FIREWOEM OF CRANBERRY. 
27 
Table 4. — Outline of spraying experiments in the control of the blackhead fire- 
worm on the H. M. Williams <£• Son's bog at Ilwaco Junction, Wash., 1919. 
Spray materials, dosage, 
nozzle, and variety of 
cranberry. 
Number gallons used per 
acre per application. 
© 
*$ 
©*3 
(-i 03 
E x 
s ® 
.2 
o 
Eh 
Berries free 
from fire- 
worm injury. 
© 
> 
o 
Pj 
O 
© 
© 
ft 
© 
© 
> 
6 
"3 
5 
03 
© 
PI 
3 
•Ceo 
•JT 
EH 
13 
i 
al 
© a 
> 03 
< 
TS 03 
3 J _ 
©xJ £ 
a 
3 © 
la © 
O 
"© 
% 
a 
'3 
o 
A.... 
B.... 
C 
D.... 
E.... 
¥.... 
Q.... 
H.... 
1 
40 per cent nicotine sul- 
phate, 1-800 + fish-oil 
soap, 2-50, mist nozzle, 
Howe variety. 
40 per cent nicotine sul- 
phate, 1-800 + fish-oil 
soap, 2-50, Bordeaux 
nozzle, Howe variety, 
40 per cent nicotine sul- 
phate, 1-800 + fish-oil 
soap, 2-50, "spray gun," 
Howe variety. 
40 per cent nicotine sul- 
phate, 1-800 + fish-oil 
soap ,2-50, " spray gun, " 
Howe variety. 
40 per cent nicotine sul- 
phate, 1-800 + fish-oil 
soap, 2-50," spray gun," 
McFarlin variety. 
40 per cent nicotine sul- 
phate, 1-800 + fish-oil 
soap, 2-50," spray gun," 
McFarlin variety. 
40 per cent nicotine sul- 
phate, 1-800 + fish-oil 
soap, 2-50, Bordeaux 
nozzle, McFarlin vari- 
ety. 
40 per cent nicotine sul- 
phate, 1-800 + fish-oil 
soap, 2-50, mist nozzle, 
McFarlin variety. 
Check on lee of plats A 
and B, Howe variety, 
untreated (for check on 
plats A andB). 
Check on lee of plats C 
and D, Howe variety, 
untreated (for check on 
plats C and D).. 
Check on lee of plats F 
and H, McFarlin vari- 
ety, untreated (for 
check on plats E, F, 
G, H). 
378 
457 
300 
300 
300 
300 
563 
499 
378 
666 
389 
389 
327 
327 
697 
388 
418 
444 
257 
257 
267 
267 
884 
499 
417 
268 
643 
554 
391 
522 
341 
315 
290 
298 
697 
485 
1,071 
1,355 
1,238 
1,499 
1,075 
1,162 
1,345 
2,343 
479 
626 
474 
Per ct. 
54.44 
58.67 
62.52 
54.30 
45.30 
41.22 
69.00 
56.50 
44.88 
43.93 
33.55 
Perct. 
89.35 
89.74 
93.05 
84.25 
87.72 
77.45 
91.97 
93.81 
59.08 
54.95 
41.56 
Perct. 
30.27 
30.66 
38.10 
29.30 
46.16 
35.89 
50.41 
52.25 
Bush. 
31.32 
46.98 
56.99 
75.06 
176. 88 
124. 65 
168. 84 
364.26 
12.80 
16.11 
15.03 
Bush. 
18.52 
34.18 
40.88 
58.95 
161.85 
109.62 
153. 81 
349.23 
2 
3 
Here an effort was made to test the three types of nozzles, namely, 
the Bordeaux, the mist type, and the spray gun, on as large a scale 
as possible, and to approach commercial spraying conditions. The 
plats selected ranged in approximate size from one- fourth to one-half 
acre and included the Howe and McFarlin varieties. These were 
previously badly infested with the fireworm and yielded few or no 
berries in 1918. Figures 12, 13, and 14 show these three types in 
actual use, and Table 4 shows the number of gallons per acre used 
in spraying with each type of nozzle, with a pressure of about 250 
pounds at the tank. A stationary power outfit was used for all the 
applications, pipes being used to convey the spray liquid from the 
pump to the plats. 
