252 



COCOA 



but when a branch has been attacked, the fungus easily 

 penetrates into the wood and generally causes the death 

 of the whole branch. 



The fungus is more common on cocoa, Para rubber, 

 nutmeg, coffee, and cinchona, but has also been found 

 on many other plants. 



Its occurrence in the cocoa fields is hardly ever so 



^--spores 



myceLium of 



_jepicLermis 

 oF b fie bwig 



FIG. 82. Fungus of the "djarnoer oepas " disease (Corticivimjavanicum). 



The figure shows the fungus in its first growth, living superficially on the twig and having 

 not yet penetrated into the tissue of the plant (enlarged 440 times, after Zimmerman). 



serious that measures have to be taken against it ; but 

 if this is necessary it is advisable to prune the trees 

 and to let sun and air penetrate into the field as freely 

 as possible by thinning out both shade and cocoa 

 trees. 



When the fungus has not succeeded in making a 

 strong growth, it may be destroyed by smearing it 

 with a weak solution of water-soluble carbolineum or 

 any other fungicide. When the disease has already 



