XIV, 1 Reinking: Coconut Bud Rot in the Philippines 137 
The bacteria are present in the xylem tubes of the young leaves, 
and of all the parts down to the woody tissue. This probably 
accounts for the rapid spread of the bacteria. 
Thus bacterial studies have proved that under certain very 
favorable conditions Bacillus coli (Escherich) Mig., and a simi- 
lar organism isolated from coconut trees, may produce disease. 
A summary of the entire bacterial investigations has indicated 
that, although the bacteria are always present and account for 
the destruction of a portion of the weakened tissues, they can 
not explain the prevalence and rapid spread of the disease. 
Further researches have been conducted in order to ascertain 
whether or not a fungus is present and is the primary agent 
in the production of the disease. 
Phytophthora faberi Maubl. studies.—While the investigations 
of coconut bud rot were in progress, studies were also being 
conducted with Phytophthora faberi Maubl. isolated from cacao. 
The latter organism proved not only to cause the black rot of 
cacao pods, the rot of papaya fruit, and the canker of cacao 
and Hevea rubber, but also to produce an infection in a number 
of other hosts as well. Table I gives a summary of these 
inoculations. 
TABLE I.—Infection experiments with Phytophthora faberi Maubl. isolated 
from the black rot of cacao pods. 
Seedlings killed by the organism: 
Annona muricata L. Guanabano; soursop. 
Hevea brasiliensis (H. B. K.) Muell. et Arg. Para rubber. 
Spondias lutea L. — 
Theobroma cacao L. Cacao. | 
Infection confined to wounds: 
Annona glabra L. 
Artocarpus odoratissima Blanco. Marang. 
Artocarpus integra (Raderm.) Merr. Jack fruit. 
* Averrhoa bilimbi L. Camias. 
Eugenia jambolana Lam. Duhat; lumboy. 
Lansium domesticum Jack. Lansones. 
Fruit rot produced: 
Carica papaya L. Papaya. 
Theobroma cacao L: Cacao. 
it of this fungus, and since 
Because of the omnivorous hab : 
A ‘og in the East, notably India, have reported 
various countries in duced by a Phycomy: cete, 
that coconut bud rot has been pro , 
Pythium palmivorum Butler, (2) it was deemed. advisable to try 
inoculations with Phytophthora faberi Maubl. isolated from ca- 
cao pods. As is shown by the inoculation experiments foam 
in Table II, a large percentage of the trees became disease 
cal 
