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On peaty lands or soils that crack, pumps are useless. In such 
cases there is no alternative but to apply Towgood’s system of 
search for termitariums, vide H. C. Pratt’s “ Observations on Termes 
Gestroi 
The external application of sundry poisons or forking insecticides 
into the ground at best only affords temporary relief. 
In the matter of wound protection, my experience is that borers 
have no regard for tar at all ; while on the other hand “ jodelited ” 
wounds are nearly always immune from attack. The most successful 
covering I have used is a combination of the two, i.e ., Jodelite as a 
first coat and tar as the next. 
Incidence of Disease. 
If we could forecast accurately the incidence of development and 
if we knew exactly when to expect the appearance of certain types of 
disease, this would go a long way towards solving many planting 
difficulties. For instance, we should know, the approximate period 
of time available wherein to complete preventive measures and also 
up to what point initiating a process of treatment would be valuable. 
With greater knowledge on this point, each estate would have a 
better chance of working out its own salvation. At present, 
unfortunately, we have little to guide us other than individual 
observation, which, of course, is unsatisfactory to base any working- 
rule on. As a beginning I record below my own ideas on their 
sequence and incidence. 
(1) Hymenochate — 
Generally occurs during 1st year. Occasionally also in 3rd 
year, but not often. 
(2) Fomes and Biplodia — - 
Commence end of 2nd year and • seldom seen after 4tli year 
(if treated). Greatest activity immediately after rainy 
season. . Fomes development is rapid. 
(3) Pink disease ■ — 
Appears early 3rd year. There is a pink and black variety. 
Both are inimical and are always constant. Activity is most 
noticeable during rains immediately following dry weather. 
(4) TJstulina and Poria — 
Robber fatalities do not often occur under eight to ten years 
old and, as a rule, trees are older. Both diseases are slow 
in development. Attacked rubber yields well for several 
years until the trees “ snuff out.” 
(5) Black line canker or black thread disease — 
May be looked for in the first year of tapping and is more 
serious when tapping on renewed bark. Most active in 
damp weather. 
