XIV, 1 
Reinking: Coconut Bud Rot in the Philippines 145 
Table VI . — Arrangement in classes of the ratio of the length to the width 
of the conidia, showing the limits of variation. 
[Corn meal cultures ; age 2 days.] 
Class. 
85 to 0.94 
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 
Spores 
in each 
class. 
0 
1 
6 
11 
36 
40 
28 
24 
23 
11 
13 
5 
1 
0 
1 
0 
Total 200 
The class of ratio values into which the greatest number of 
conidia fell was 1.35 to 1.44. The mean ratio of length to 
width would thus have an approximate value of 1.4. These 
figures correspond closely with those obtained for Phytophthora 
faheri Maubl. by Rosenbaum. (lO) 
Germination of the conidia. — Germination takes place by the 
production of either germ tubes or swarm spores. Every coni- 
dium is potentially a sporangium; its method of germination 
is influenced greatly by its environment. Germination by germ 
tubes is by far the commoner method under cultural conditions. 
From one to five germ tubes may be produced ; these apparently 
may develop from any part of the surface of the conidium. Up 
to the present time, no swarm-spore formation has been ob- 
served in the cultures obtained from coconut; but in those iso- 
lated from cacao germination by this method was frequently 
produced. During the first trials it was found impossible to 
obtain germination by swarm spores. In the months of Feb- 
ruary and March, at which time the nights are cool, swarm 
spores were produced abundantly in old cultures on macerated 
