DISEASES 159 



times attacked by the fungus. Until recently the 

 fungus was considered to be confined to Coffea 

 arabica and Coffea liberica, but it has now been 

 found on other kinds, such as Coffea robusta, and 

 on certain so-called " wild " kinds of Coffee found 

 in Africa. Unfortunately, up to the present, no 

 means of keeping this parasite in check have been 

 discovered. Spraying with Bordeaux mixture, 

 where practicable, would be effective, but the 

 spraying should be commenced before the appear- 

 ance of the fungus on the leaves. In those dis- 

 tricts where the fungus has been previously ob- 

 served, the planters will know the proper time 

 from experience. The danger arising from the 

 presence of fallen diseased leaves must be kept in 

 mind. It has been demonstrated that Coffee trees 

 grown in the open are less susceptible to the 

 disease than those grown in the shade. 



Root Disease of Hevea (Para Rubber). 

 (Fomes lignosus.) 



This fungus has hitherto been called Fomes 

 semitostus, but it has recently transpired that a 



