August, ’20] 
CHILDS: CALYX WORM CONTROL 
335 
Table I— Relation of Side to Calyx Worms 
Hood River, 
Oregon, 
1917, 1918 
AND 1919 
Total 
Per cent 
Per cent 
Relation of side 
Exp. no. 
How applied 
per cent 
side 
calyx 
to calyx worms 
1917 
worms 
worms 
worms 
in per cent 
1 
Last spray 
omitted 
12.96 
9.28 
3.68 
71.6 to 28.4 
2 
Dust 
5.37 
5.00 
.37 
92.99 to 7.01 
3 
Last spray 
omitted 
14.33 
10.54 
3.79 
73.55 to 26.44 
4 
Rods 
1.43 
1.14 
.28 
80.00 to 20.00 
5 
Check 
65.13 
20.62 
44.51 
31.68 to 68.32 
1918 
6 
Dust 
2.68 
2.54 
.14 
94.7 to 5.2 
7 
Gun 
.44 
.44 
.0 
100.00 to .00 
8 
Check 
17.64 
12.9 
4.7 
73.29 to 26.7 
1919 
9 
Rods in calyx, guns 
in other sprays 
2.39 
2.05 
.34 
85.74 to 14.28 
10 
Gun all sprays 
2.27 
1.91 
.35 
84.24 to 15.71 
11 
Rods all sprays 
3.41 
3.12 
.29 
91.64 to 8.54 
12 
Guns, fruit from 1 to 
12 ft. high 
1.08 
.99 
.09 
90.9 to 9.0 
13 
Guns, fruit from 12 ft. 
to tree top 
5.1 
4.2 
.9 
81.13 to 18.86 
14 
Check 
53.6 
24.2 
29.4 
45.16 to 54.83 
Note—1917; Five standard sprays applied unless otherwise stated. 
1918; Four standard sprays applied. 
1919; Five standard sprays applied. 
In Exp. 12, fruit separated from ground to 12 feet. Exp. 13, from 12 feet to 
top of trees. 
sprayed with the gun throughout the season (Exp. 10). Another 
was sprayed with twelve foot rods throughout the season (Exp. 11). 
Experiment 9 gives the results obtained with the use of rods in the 
calyx application, guns being used for the other sprays. The varieties 
used in the test were Jonathans, Newtowns, and Spitzenbergs. The 
tree were fifteen years of age. This discussion, presented in the accom¬ 
panying table, with the exception given, includes the results obtained 
in the Spitzenberg block only. The spray was applied by the owner 
and his hired man under the supervision of the writer who followed 
behind the men while the trees were being sprayed in each application. 
Two guns were used on a 3J power outfit of a well-known make. The 
work was well done and well timed throughout the season. Five appli¬ 
cations of arsenate of lead were used during the year; the last one, as 
the season finally turned out, was not very important. A summary of 
the results not only s'hows that the gun held its own in obtaining codling 
moth control but gave better control than the rods and also where the 
rods were substituted in the calyx application that the calyx cups 
