DISEASES 



269 



tree should be visited again from time to time, to make certain 

 that all danger is past. In Sumatra planters had noticed that 

 pink disease was especially prevalent amongst rubber trees 

 interplanted with Liberian coffee. When the coffee was cut 

 out the disease ceased to be troublesome. 



FIG. 77. Burr Growths (Actual Size). 



According to a Dutch authority, the typical form in which 

 this fungus appears is a thin, continuous pink sheet which be- 

 comes cracked all over the surface and assumes a yellow tint 

 after some time. It also occurs in damp situations, such as 

 forks of trees, in the form of a thin matting of silver-coloured 

 filaments. It is also sometimes found in cracks of the bark in 

 the form of small pads pink in colour. It penetrates into the 



