75 
spot they push out the mycelium tubes into the bark and so the 
disease commences. 
Occasionally trees cure themselves, but this must not be relied on. 
The fungus dies and the growth of the tissues round the cankered 
spot serves to drive out the dead piece. A considerable proportion of 
the fruits of the Para rubber tree having been found to have fallen 
unripe, they were examined and were found in some cases at least to 
be infected with the canker, but whether they were attacked while 
on the tree or after falling seems doubtful. In any case fallen black 
fruits should be destroyed when found. 
To cur e the tree it is necessary to cut out all the diseased part of 
the bark down to the wood, if the disease has spread as far. A 
margin of not less than 2 inches should be cut round the discolored 
area so as to be sure of getting out all the mycelium. Dying 
branches high up in the tree should be suspected and cut well back • 
and all dead or diseased pieces destroyed by fire as near as possible 
as it is dangerous to carry them about the plantation, for fear that 
any spores on them might be drifted into the trees as they are bcrne 
This is only a short precis of the paper which is a very import- 
ant one for planters of rubber. The disease is one which as yet is 
not common at least in the Malay Peninsula, although it has been 
reported thence; therefore care should be taken that it does not in- 
vade the country, or if it does appear that it should be rigorously 
looked for and destroyed when found. As it is certainly more fre- 
quent in Ceylon than in the Peninsula, great care should be exer- 
cised m introducing fresh stock of rubber plants and seeds from 
that country. Seeds in themselves are ' doubtless quite safe, but 
fragments of the husks picked up on the ground and such like 
material sent in packing might possibly introduce the plant. Seed- 
hngs again are probably safe, but stumps of a greater age might 
be infected. Estates should be regularly and carefully inspected 
tree by tree by the planter to see that neither this nor any other 
disease is threatening, and steps taken at once to check any that 
f ° U , nd - .4" '".sanitary estate is a danger to its neighbours 
and it is almost invariably the case that the bad outbreaks of dis- 
ease m plantations have been due to carelessness and ignorance of 
one or two owners. — Editor. 
HEVEAS IN THE AMAZON. 
In the Beihefte zum Tropenpflanzer, Vol. VI I, p. i, just published, 
is the account of an expedition by Herr Ule to the Rubber region 
Ttuhh, ^ azons „ to mvestigate the collecting and preparatio# of 
Srms nfH ere ' He , mentions and partly describes 13 species or 
“ of , Hem . and g‘ ves a figure of H. braziliensis and H. discolor, 
to i e f -r eS l r ‘ ptIO u S of ™ ost . of his new s P ecies are quite insufficient 
the , m b - v - H . e gives also an account of the methods of 
collecting and preparation of the rubber by the Seringueiros, and 
