5 
€ 
The following measures should be taken to combat the disease :— 
i. Spray with Bordeaux mixture, commencing sy the pods 
are quite young, and continue at intervals of ten da 
dilute solution should first be used until its effect on the fruit 
and foliage is ascertained. A small quantity of dried blood should 
be dissolved and added to the mixture; its adhesive property is 
re increased, and fewer sprayings are required. 
Remove all diseased fruit from the tree if ee 
diss a continuous supply of conidia will be furnished until the 
fruit decays. Do not allow diseased fruit or “shells” to tae 
on the ground. All such should be collected and burned. 
iii. Endeavour to sini by careful examination, whether 
the fungus may not be also parasitic on other hosts; it very 
frequently attacks seedlings, and would be recognised by the 
wilting of the attacked parts, and by the delicate white mould-like 
conidial form of reproduction. 
NECTRIA BAINII, Massee. 
This parasite causes semicircular $i blotches to appear on the 
pods, the diseased portion becoming soft and watery. Ata later 
Stage the blotches become covered with a loosely interwoven layer 
of yellowish-rust coloured or orange mycelium which is studded 
over with the minute bright red perithecia or fruiting organs of 
the fun 
The perithecia are often preceded by a small snow-white 
Fusarium-like mould, which, from analogy with other species, 
may be a conidial condition of the eh, ia. But the connection 
has not however been proved by culture 
This parasite may possibly be quite mee but great care should 
be taken to arrest any attempt on the part of the fungus to attack 
the trunk of the pe tree, for as already stated the destructive 
canker disease of the cacao in Ceylon is caused by a Nectria. 
Nectria Bainii, Massee. Perithecia gregaria, mycelio maculi- 
formi MU Lp a vel aurantiaco insidentia, sphaeroidea, 
rubra, lanosa, demum supra calvescentia, 300-350 a ee Tod 
cylindracco-clavati, breviter pedicellati, octospori, 80-90 x 7-9 u. 
Spore distiche, oo eee utrinque subacute, gebe 
10-12 x 5 u, hyalin GEO . MASSEE. : 
Fig. 1. Phytophthora omnivora ; Section of a portion of a cacao 
fruit, showing the conidial form of reproduction of the fungus 
on the surface, x 300. 
2. A conidium of the same germinating, x 300. 
3. Oospores of the same produced in the diseased tissue of a 
cacao fruit, x 
4. Pustule of Nectria bursting through the skin of a cacao  - 
fruit, and producing the conidial form of So Neale ia x 40. 
5. Portion of the conidial n of HUE 
6. Free conidia of game, x 
