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As in all cases of root disease there is hardly an efficacious remedy. 
Watering the soil with disinfectant will injure the plants and the rem- 
edy may be worse than the disease. On the contrary improving _ the 
conditions of cultivation, especially the drainage where the soil is 
moist, is of the first importance. The diseased plants must be pulled 
up and burned, the infected spots must be worked over several times 
with lime, and Hevea must not be again planted before the soil is 
certainly disinfected. The disease rarely shows itself on plants put in 
a virgin soil, but on the contrary always in those planted in an 
exhausted soil. (It is very common on trees in virgin soil in the 
F. M. S. Transl). The infected areas may be with advantage isolated 
from the rest by trenches in which lime is scattered. When the 
disease is suspected the soil should be doused frequently with a 
solution of lime in water. This cheap procedure is very effective 
because it renders the soil alkaline which condition is not favourable 
to the growth of fungi. . 
(c) . Fusicladium, sp : Black Canker. Material showing a black 
canker of the stem has been several times sent in for examination. 
The fungus appears to belong to the genus Fusicladium. The disease, 
which is not yet serious, occurs on the cut ends of branches or stems 
left by pruning. The leaves fade, dry up, become yellow, and fall off ; 
the flow of latex diminishes rapidly, and soon ceases totally ; in a few 
days the plant is dead. Sometimes only the higher parts die and new 
branches come out below.” Cryptogamie parasites of less importance 
mentioned by the author are 
(d) , Pestalozsia Palmarum which has been frequently noticed 
on the leaves of Hevea. 
(c). Stilbella Hevea, (Zimm.) Bern. According to .Zimmerman 
this is probably not a parasite and the other thinks it of little import- 
ance as far as Hevea is concerned. The author goes on to comment 
on (f) lalang, (g) piercing insects on young nursery plants, (h) boring 
insects, (i) white ants (termites), (k) red ants, and other pests 
such as caterpillars and pigs. 
White ants in Java are not, the author says, directly injurious, 
and do not generally attack healthy vigorous plants. He recommends 
sprinkling the base of the trunk on which they appear with Solignum. 
Among the enemies of Ficus elastica (Rambong) the author gives 
“ lalang ” the first place mentioning Zimmerman’s opinion that there 
is only one real cryptogamie parasite of Ficus elastica , namely 
Nectria gigantospora , and this the author has not met. 
Certain areas on a Ficus plantation were suffering from a disease 
of an unknown nature. All the plants over a considerable area had an 
unhealthy appearance; the yellow withered leaves were rapidly drop- 
ping off. " An examination of the unhealthy specimens failed to dis- 
cover in the leaves, branches or stem a parasite to which the disease 
could be attributed. The defective turgescence of the leaves and their 
premature fall are rather the appeai'ances which characterise a plant 
weakened by unfavourable conditions of existence. On all the areas 
attacked lalang had reached a good development, and it was clear that 
this undesirable plant was the origin of the trouble. When lalang is 
abundant it not only exhausts the soil of nutritive materials but 
