Lee: Citrus-canker Control 
19, 2 
143 
Table 7. — Degree of canker affection of trees in Plat IV of the College 
of Agriculture citrus planting at Los Banos — Continued, 
Species. 
Leaves affected. 
August, 1917. 
August, 1918. 
Per cent. 
40 
Number. 
Per cent. 
Number. 
10 
Do 
50 
i 
Do 
40 
i 
50 
25 
Do - 
5 
16 
Do 
1 
5 
Do 
2 
21 
Do 
2 
18 
It is apparent that some reduction in the amounts of canker 
infection was accomplished in the foregoing plats. 
PLAT V, AT LOS BANOS 
The trees in this plat were of the same species and varieties 
as those represented in Plats I, II, III, and IV. This plat was 
left entirely untreated, as a check upon the sprayed plats. 
Table 8. — Degree of canker affection of untreated trees in Plat V, of the 
College of Agriculture citrus planting at Los Banos. 
Species. 
Leaves affected. 
August, 1917. 
August, 1918. 
Per cent. 
Number. 
Per cent. 
Number. 
25 
40 
Do... . . 
20 
2 
Do.. 
20 
1 
Do _ 
25 
37 
Citrus mitis 
0 
0 
0 
0 
Do 
0 
0 
0 
0 
5 
5 
Do 
5 
5 
Do .. 
22 
10 
Do 
5 
37 
Do 
1 
1 
Do... 
1 
1 
Do 
12 
0 
0 
Citrus hystrix 
10 
0 
0 
5 
5 
Do 
5 
20 
Do. 
2 
2 
Do 
1 
0 
0 
Citrus maxima 
50 
21 
Do 
1 
1 
