M ELANCON I ACE^E. 



PESTALOZZIA PALMARUM, Cooke. 

 (Leaf Disease of Coconut). 



A leaf disease of the coconut has been reported to be 

 caused by this fungus in Trinidad and in Cuba. The 

 fungus appears to be only a weak parasite. The leaves 

 droop and wither at the tip, yellowish spots appear on 

 them, and these frequently run together. The colour of 

 the spots changes to a greyish-white with a greenish-brown 

 margin. Finally, the internal tissues of the leaves become 

 destroyed. The leaf-area of the plant is reduced and the 

 yield of fruit is consequently poor ; the nuts produced are 

 usually small. 



Diagnosis. — Erumpent, blackish, gregarious or scattered ; 

 conidia fusiform, 15 by 5-6 microns, 4-septate, blackish; 

 stalk elongated, hyaline. 



Stockdale: West Ind. Bull., Vol. VI., p. 313; 

 Vol. IX., p. 371. 



COOKE : Grevillea, Vol. V., p. 102, pi. 86. 



PESTALOZZIA GUEPINI, Desm. 

 (Leaf Disease of Para Rubber.) 



The fungus has been reported to occur frequently on 

 the leaves of seedlings of Hevea brasiliensis in Ceylon ; it 

 appears to do little damage to the leaves, but it kills the 

 seedling when it attacks the stem at the collar. The 

 diseased patch takes the form of a white ring surrounding 

 the stem and bordered by a narrow, red-brown line. 



Other fungi which occur on the leaves of seedlings of 

 Hevea brasiliensis are : — 



Helmintkosporium Hevece, Petch. 

 PJiyllosticta Hevece, Zimm. 

 Gleosporium Elasticce, Cke. and Massee. 



The damage done, however, appears to be limited to 

 small areas of the leaf and is but small. 



PETCH : Circulars and Agrtc. Journ., Royal Bot. 

 Gdns., Ceylon, Vol. III., No. 21, 1906. 



Pestalozzia fuscescens, Sor., var. Sacchari, Wakker, pro- 

 duces yellow spots changing to a darker colour on leaves 

 of sugar cane in Java. 



Wakker and Went: " De Ziekten van Jut Suikerriet 

 op Java," p. 162. 



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