40 
Treatment of Disease, 
To be effective, treatment ought not to be merely a combative 
measure. It should also be curative. On this principle 1 have 
based my classification. 
So far as the subject has reference to those diseases and pests 
that I have classed as “amenable to treatment” I only intend to 
touch on a few of the more important, i.e., 
(1) Phythopthora , because, to my thinking, canker is about 
the nastiest thing we have to contend with ; 
(2) Pink disease, because of the application of different 
methods ; 
(3) Gestroi , in regard to the use of pumps. 
(1). Phythopthora. The ordinary planter knows it under three 
headings : 
(a) Black line or black thread canker ; 
( b ) Bark rot (claret canker) ; 
(c) Leaf and pod disease. 
Whether these three are all one and the same matters little. 
The fact remains, they ai’e so closely allied, that curative and 
preventive operations (to be successful) should be worked conjunc- 
tively and as part of the same scheme. 
In regard to black thread canker : estates in Burma have 
furnished ns with most experience, and from my knowledge of them 
and from what 1 have seen there it is my opinion, that this disease 
can be effectively dealt with, by adopting a combination of rules as 
follows : 
(1) No tapping on any very damp day ; 
(2) Decrease frequency of tapping on a'ny field so attacked, as 
progress of disease is checked on cessation of tapping 
or by dry weather. 
The more constant the opening of a wound the more suscept- 
ible and receptive it becomes, as black thread canker is a wound 
parasite and it attacks the delicate tissue exposed by tapping. 
(3) The immediate painting of all diseased parts or wounds 
with Jodelite, which gives a sort of protective covering 
by systematic painting on a monthly round ; 
(4) Sanitation firing, i.e., systematically burning all. leaves 
and droppings ; and 
(5) Above all things avoid cambium wounding, which means 
no deep tapping. 
Chiselling the disease out of a tree is not looked upon with any 
favour in Burma, and I personally share this view, also shared by 
H. C. Pratt. This does not refer to burr and nodule removal and if 
the painting mentioned elsewhere is put in — Jodelite — any of them 
will penetrate this and destroy it. If the disease is so bad as to 
