244 DISEASES OF TROPICAL PLANTS 



CH. 



also kill trees which are 12 or 14 feet in height. It can 

 be easily controlled by the use of Bordeaux. 



Root Disease. A root disease due to a fungus has 

 been reported as destructive from Malacca, but the 

 literature concerning it is so meagre that the writer 

 cannot give a discussion at this time. 



Irpex flavus, Klotsch, has been reported on the 

 cloves for Malacca (see pp. 65, 168, 196). 



GINGER 



Very little has been written about the diseases of 

 this plant, but what is, or may prove to be, a very 

 serious trouble has been reported from Jamaica. 1 It is 

 due to a fungus which attacks the rhizomes or under- 

 ground parts of the plants. Although there is no 

 satisfactory description of this fungus it is recommended 

 that where very destructive the old plants should be 

 burned, and the new rhizomes be soaked in Bordeaux 

 before planting. 



NUTMEG 



A bark disease due to Eutypa erumpens, Massee, 

 has been reported from the Barbadoes, Grenada, and 

 Trinidad. It also occurs on the cacao. 



A root disease due to Corticium javanicum, Zimm., 

 has been reported from Java. 



RAMIE CINCHONA 



Both ramie and cinchona are subject to the attacks 

 of Corticium javanicum, Zimm., in Java. 



PEPPER (Piper nigrum) 



Wilt Disease. This disease, which is well known in 

 parts of the East Indies, is caused by a species of 

 Nectria. Both the fungus and the general character- 



1 Jamaica Bulletin for November and December of 1901 and February of 

 1902. 



