Aug. ii, 1933 
Phytophthora Faberi on Coconut and Cacao 
277 
For the cacao strain the conidia varied in length from 19.5 to 89.49 n t 
and in width from 11.5 to 41.49 ju- In length the majority of the spores 
fell into the classes between 37.5 and 63.49 ju, the average length being 
51.92 /i. In width the majority fell into classes between 19.5 and 39.49 
the average width being 30.67 /jl. 
The measurements of both strains show a remarkable similarity. 
Figures 1 and 2 present the measurements in graphic form and clearly 
show the close similarity of both strains. 
Table II gives the arrangement in classes of the ratios of the length 
to the width of the conidia for both strains. 
Table II .—Arrangement in classes of the ratios of the length to the width of conidia , show¬ 
ing the limits of variation 
0.95 to 1.04, 
1.05 to 1.14 
1.15 to 1.24 
1.25 to 1.34 
1.35 to 1.44 
1.45 to 1.54 
1.55 to 1.64 
1.65 to 1.74 
1.75 to 1.84 
1.85 to 1.94 
1.95 to 2.04 
2.05 to 2.14 
2.15 to 2.24 
2.25 to 2.34 
2.35 to 2.44 
2.45 to 2.54 
2.55 to 2.64 
2.65 to 2.74 
2.75 to 2.84 
2.85 to 2.94 
2.9s to 3.04 
3.05 to 3.14 
3.15 to 3.24, 
3.25 to 3.34, 
3-35 to 3.44 
3-45 to 3.54. 
3.55 to 3.64, 
Class (in microns). 
Number of 
coconut 
spores in 
each class. 
Number of 
cacao 
spores in 
each class. 
0 
O 
I 
2 
6 
7 
3 i 
22 
43 
43 
57 
54 
80 
59 
53 
S 2 
39 
54 
28 
35 
17 
27 
24 
19 
9 
8 
4 
5 
3 
2 
2 
5 
0 
0 
0 
0 
0 
0 
0 
0 
0 
1 
1 
0 
1 
0 
0 
0 
0 
0 
1 
0 
0 
0 
400 
Total 
400* 
