1921 
142 The Philippine Journal of Science 
Table 7. — Degree of canker affection of trees in Plat IV of the College 
of Agriculture citrus planting at Los Banos. 
Species. 
Leaves affected. 
August, 1917. 
August, 1918. 
Per cent. 
Number. 
Per cent. 
Num her. 
50 
Do 
50 
Do 
25 
2 
Do 
1 
o 
o 
1 
o 
o 
Do 
2 
o 
o 
Do 
20 
1 
Do 
20 
0 
o 
Do 
2 
Do 
5 
1 
Do 
15 
6 
3 
o 
0 
Do 
4 
o 
0 
Do. 
0 
0 
0 
0 
10 
0 
o 
15 
4 
Do 
10 
2 
Do 
5 
o 
0 
Do 
5 
o 
0 
Do 
2 
o 
0 
Do 
1 
5 
Do 
5 
0 
0 
Do 
5 
5 
Do 
1 
o 
0 
Do 
2 
o 
0 
Do 
2 
0 
o 
Do 
1 
3 
Citrus hystrix - 
0 
0 
0 
0 
Do 
0 
0 
0 
0 
Do 
0 
0 
0 
0 
Do 
5 
0 
o 
2 
0 
0 
Do 
2 
0 
o 
Do 
1 
o 
o 
Do 
20 
(“) 
(») 
2 
6 
Do 
3 
15 
Do 
2 
9 
Do 
2 
35 
25 
1 
Do 
50 
1 
Do 
25 
1 
Do 
25 
2 
50 
5 
Do 
15 
6 
Do 
50 
6 
Do 
50 
5 
Do - - - 
0 
0 
0 
0 
a Dead. 
