90 
Mai\v writers have experimented upon the effect of 
upon the tree. LeBaron gives the following table: 
Table VIII. — Xumher of Jarvx caught under bands. 
'eral bands 
Date of examination. 
July 28. 
Aug. 11. 
Aug. 25. 
Sept. 9. 
Sept. 23. 
Bands on limbs 
43 
83 
94 
31 
13 
21 
7 
15 
24 
9 
39 
33 
4 
Middle bands 
99 
Lowest bands 
28 
On a single tree, from July 4 to July 23, the same writer found 110 
larvae under the top band and 150 under the lower band. 
The author states that the windfalls in ever}^ case were left as they 
fell. In the season of the year when a large number of the wormy 
apples were on the ground the lower band caught most of the larvae, 
while durinof Julv, when the windfalls caused bv the first o-eneration 
had hardly begun to fall, the larger number of larvae were caught bv 
the upper band. 
Professor Aldrich experimented upon one large tree and five bands. 
The tal)le made from these experiments is here given. 
T.\BLE IX. — Professor Aldrldi's record of hands on one tree. 
July— August — 
September— 
October— 
7.jl5.|21. 
30. 
*^- 
12. 
18. 
26. 
4. 
10. 
17. 
25. 
1. 
8. 
15. 
Top 
2 27 
32 
11 
20 
7 
8 
4 
4 
6 
2 

20 
13 1 
156 
Second 
4 
9 
12 
1 
6 
13 
3 
1 
3 
7 
8 
9 
4 1 
80 
Third 
1 4 
5 
12 
14 
6 

6 
2 
3 
3 
13 
11 
6 i 
8(5 
Fourth 
1 4 
11 
11 
11 
3 
4 
2 
1 
2 
4 
7 
8 
6 ' 
75 
Bottom 
I 3 
7 
18 
17 
1 
7 
8 
4 3 .... 
8 
9 
7 
3 
97 
Total 
1 1" 
64 
64 
63 
23 
32 
23 
12 1 17 
.... 24 
37 
55 
34 j 
494 
Out of a total of 194 larv» about 30 per cent were caught on the 
u])per hand, and the lower band caught more than an}^ of the inter- 
mediate ones. The experiment also shows that in seeking a place for 
their cocoons the larvae will cross several bands, and as there is no 
way bv which those going up the tree and those going down can be 
separated, no exact percentages of such can be given. 
Wickson found by carefulh^ conducted experiments that while 2,701: 
apples and pears were counted from which larva? had escaped, there 
were only 1,188 under the bands, or 1:1 per cent. The remaining 56 
per cent either found other places in which to spin their cocoons or 
were destro3'ed by their enemies. The percentage of larva? caught 
upon a tree will depend entirely on the condition of the tree. If the 
tree is free from cracks, holes, and rough bark, more larva> will ])e 
caught; while if there are other places in which they can spin, fewer 
of them will go under the bands. 
It has been fully demonstrated that in l^adly infested orchards of 
the West only a comparatively small percentage of the fruit can l)e 
saved bv bands alone. 
