CERCOSPORA COFFEICOLA, B. & C. 

 (Coffee Leaf Spot.) 



This fungus has been reported to occur on leaves of 

 the coffee plant in Trinidad. 



Spraying with an ammoniacal solution of copper car- 

 bonate would be effective in preventing the disease ; the 

 spraying should commence when the leaves are young and 

 should be repeated at intervals. 



Diagnosis : — Spots amphigenous, 2-3 mm. diameter, 

 light-coloured or white in the centre with a reddish-brown 

 margin ; hyphae mostly epiphyllous, tufted on the small 

 tubercular base, 50-75 by 4 microns, 2-3-septate, fuscous, 

 sometimes elongated to 100 or 350 microns, nodulose and 

 toothed above; conidia hyaline, 2-4-septate, 75 by 3 

 microns at the thicker end. 



Journal of Mycology, Vol. IV., p. 5. 



CERCOSPORA PERSONATA, Ellis. 

 (Leaf Spot of Ground Nut.) 



This disease has recently occurred in Dominica. Brown, 

 almost circular spots are formed on the under surface of 

 the leaves, about 2-4 mm. in diameter. 



Spraying the leaves with an ammoniacal solution of copper 

 carbonate, as in the above disease, is an effective remedy. 



Diagnosis : — Hyphae densely caespitose, short, brown, 

 continuous ; conidia clavate, pale-brown, 3-septate, 30-50 

 by 5 microns. 



ELLIS : Journal of Mycology, 1885. 



CERCOSPORA VAGINAE, Kr. 

 (Red Spot of Sugar Cane.) 



Red spots are produced on the leaf stalk, the spots being 

 confined to this part of the leaf. The disease is known in 

 the West Indies, Java, and India. 



Several other species of the genus Cercospora occur on 

 the sugar cane. They are : — 



C. longipes, Butler — causing the " brown leaf spot " of 

 Bengal. 



C. Sacchari, Breda de Haan — causing the " eye spot " 

 disease of Java. 



C. acerosuni, D. and H. — " black spot " of Java. 



C. Kopkei, Kr. — " red leaf spot " of Java. 



Butler : Memoirs of the Agric. Dept. in India , Vol. I., No. 3. 



55 



