Diagnosis : — Perithecia scattered, in the cortex, innate, 

 black ; spores ellipsoid-oblong or sub-ovoid, I -septate, 

 obtuse at both ends, loculi i-guttulate, sooty black, 18-22 

 by 12-14 microns. 



A. Howard : West Ind. Bull., Vol. II., p. 203. 



P. HENNINGS : Fungi camerunenses I. ; Engler Bot. 

 Jahrb., Bd. XXII., S. 72. 



F. A. Stockdale : " Fungus Diseases of Cacao " ; 

 Imperial Dept. Agric. for the West Indies, Pamphlet 

 Series, 54, 1908. 



Van Hall : Dept. van den landbouzu, Suriname, Bull. 

 21, 1909. 



In addition to occurring on the cacao plant the fungus 

 is known to cause a disease of the sugar cane, it is said to 

 grow on Castilloa in the West Indies and to cause a root 

 disease of coconut in Trinidad. 



It is evident that an alteration of the generic name can 

 only be satisfactorily effected if a revision of the allied 

 genera Diplodia, Lasiodiplodia and Ckcetodiplodia is made. 

 At present it is possible to produce specimens of Diplodia 

 cacaoicola which may be classified under Diplodia, Lasio- 

 diplodia, or Ckcetodiplodia. In the above account of the 

 disease caused by the fungus the old name Diplodia 

 cacaoicola has been preserved in order to avoid confusion. 



Lasiodiplodia tubericola, has been reported to cause a 

 disease of fruits of mango in San Domingo. 



Lasiodiplodia sp., is described by Mr. O. W. Barrett as 

 being responsible for the greater amount of the damage 

 done to pods of cacao in Trinidad. This is probably 

 identical with Diplodia cacaoicola. 



BARRETT: Agric. Soc. Proc, Irinidad and Tobago, 

 No. 280. 



DIPLODIA RAPAX, Massee. 

 (Stem Disease of Para Rubber). 



In July, 1909, a stem disease of Hevea brasiliensis -was 

 reported from the Federated Malay States and was shown 

 to be caused by the above fungus. 



The younger shoots are attacked, turn black and 

 eventually die ; the disease continues to spread downwards, 

 and the trunk of the tree becomes affected and finally 

 perishes. 



40 



