132 PLANT DISEASES 



EGG-PLANT ROT 



{Nectria ipomoeae^ Hals.) 



The Fusarium condition causes stem-rot of the egg- 

 plant [Solaniwi ?fielonge7ia, L.) and sweet potato {Ipomoea 

 batatas^ Poir.), covering the withered stems with a white 

 mould. At a later stage clusters of flesh-coloured peri- 

 thecia appear. The disease usually commences near the 

 ground-line, and spreads both into the stem and the root. 



Halsted, Ajiu. Rep. N. Jersey Agric. Expt. Statioft, 

 1891, p. 281, figs. 



Nectria vandae (Wahrlich) is a parasite on the root of 

 Va?tda suavis in cultivation. 



Nectria goroshankiniana (Wahrlich) is also parasitic on 

 the root of cultivated plants of Vanda tricolor. 



Wahrlich, Bot. Ztg., July 23, 1886. 



CACAO DISEASE 



Mr. J. B. Carruthers, who has spent some time in 

 Ceylon investigating the destructive disease attacking the 

 cacao tree, has published his report, of which the following 

 is a summary. The name of the fungus causing the dis- 

 ease is not given, but the account leaves little doubt that 

 it is a species of Nectria, allied to the species causing 

 canker in the wood of the apple-tree. 



The first indication of disease is a darkening of a patch 

 of the cortex ; if this patch is cut out it Is found to be 



