4^ 



Treatment of Disease. 

 To be effective, ti'eatment ought not to be merely a combative 

 measure. It should also be curative. On this principle I 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) Phythojpthora, 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). Phythojpthora. The ordinary planter knows it under three 

 headings : 



(a) Black line or black thread canker ; 

 (6) Bark rot (claret canker) ; 

 (c) Leaf and pod disease. 



Whether these three are all one and the same matters little. 

 The fact remains, they are 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 us with most experience, and fi^om my knowledge of them 

 and fi'om what I 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 any field so attacked, as 



pi'ogress of disease is checked on cessation of tapping 



or by dry weather. 

 The more constant the opening of a w^ound 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 



