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disease was common in only three small centres but 
in 1913-14, it assumed epidemic form, and spread 
rapidly, practically throughout the whole Peninsula. 
The name. Pink Disease, is associated with the 
commonest appearance, a continuous pink incrusta- 
tion covering the attacked branches. The othey 
manifestation, which calls for most attention, is the 
“ Necator ” stage which occurs in the form of a 
series of orange red pustules. These are made up 
of cells which vary much in size; under suitable 
conditions the component cells break apart and are 
blown about as single-celled spores. The “ Necator ” 
was originally believed to be a fungus different from 
that causing Pink disease, and was named Necator 
decretus . During wet w T eather Pink Disease becomes 
very active, and it may be necessary to increase the 
number of coolies in the ** Pest gang ” in order to 
control the disease. Painting the affected branches 
with tar, or with a mixture of tar and crude oil, is 
an effective control, if the disease is taken in hand 
at an early stage. 
Diplodia cacaoicola. 
4 ‘ Die-back Disease.” The fungus, Diplodia cacaoi- 
cola is a wound parasite which can enter through 
the smallest wounds, and is a common disease 
in all plantations, more especially when growth 
conditions are adverse. After this fungus has 
entered the tissues, it passes up and down the 
water-conducting vessels very rapidly, and prevents 
the upward passage of water to the leaves, which 
wilt and die. The threads of the fungus, dark in 
colour, cause a pronounced ashy-grey discoloration 
in attacked wood, which is very characteristic. A 
noticeable feature, at times, is the association of 
