552 
Joumal of Agricultural Research 
Vol. XXX, No. 0 
Table XVII. — Mortality by diameter classes (in percentages) 
SEVERE FEEDING 
Tree species and association 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
Balsam: 
Softwoods of Tables VIII and 
IX... 
40 
71 
75 
83 
79 
96 
83 
67 
0 
100 
0 
Free trees in hardswoods, Ta¬ 
bles XII and XIII. 
50 
62 
82 
79 
70 
93 
79 
92 
90 
83 
ioo 
Red spruce: 
Softwoods of Tables VIII and 
IX... 
19 
9 
36 
39 
33 
32 
29 
7 
11 
0 
0 
Free trees in hardwoods, Ta¬ 
bles XII and XIII_ 
20 
31 
23 
22 
36 
26 
20 
14 
0 
0 
a 
White spruce: 
Softwoods of Tables VIII and 
IX__ 
48 
60 
56 
12 
32 
32 
21 
32 
21 
0 
o 
Free trees in hardwoods, Ta¬ 
bles XII and XIII.. 
54 
24 
30 
17 
13 
0 
0 
0 
0 
a 
LIGHTER DEGREES OF FEEDING 
Balsam: 
Softwoods of Tables X and XI. 
Overtopped trees in hard¬ 
woods, Tables XII and 
XIII___.. 
Red Spruce: 
Softwoods of Tables X and XI. 
Overtopped trees in hard¬ 
woods, Tables XII and 
XIII____ 
White spruce: 
Softwoods of Tables X and XI. 
Overtopped trees in hard¬ 
woods of Tables XII and 
XIII. 
55 
71 
48 
33 
19 
21 
16 
21 
18 
0 
0 
30 
37 
49 
44 
42 
30 
18 
29 
0 
25 
3 
0 
0 
0 
0 
0 
0 
0 
0 
57 
11 
8 
9 
12 
8 
0 
0 
39 
35 
24 
3 
0 
0 
0 
0 
0 
0 
0 
33 
29 
33 
17 
18 
8 
0 
0 
0 
. 
Table XVIII. — Rate of growth before and after budworm attack 
FROM SPRUCE FLAT TYPE, BATHURST, NEW BRUNSWICK 
Balsam 
Red spruce 
White spruce 
10 
years 
before 
5 
years 
before 
10 
years 
after 
Num¬ 
ber of 
trees 
i 
10 
years 
before 
5 
years 
before 
10 
years 
after 
Num¬ 
ber of 
trees 
10 
years 
before 
5 
years 
before 
10 
years 
after 
Num¬ 
ber of 
trees 
Living 0 . 
Dead &_ 
Mm. 
19.9 
12.2 
Mm. 
9.2 
5.4 
Mm. 
11.0 
85 
199 
Mm. 
12.2 
9.3 
Mm. 
5.7 
4.4 
Mm. 
7.2 
88 
192 
Mm. 
12.3 
5.5 
Mm. 
5.6 
2.2 
Mm. 
6.5 
89 
13 a 
FROM NORTHERN HARDWOOD TYPE, BATHURST, NEW BRUNSWICK 
Living 
Dead.. 
18.9 
10.4 ' 
12.5 
90 
19.8 
10.0 
13.0 
116 
18.7 
9.9 
63 
16.6 
9.6 
76 
FROM METIS LAKE, QUEBEC 
Living. 
11.5 
5.3 
7.8 
16 
! 
1 
! 
° From trees which recovered. 
b From trees which died in 1922 from effects of defoliation 
