3. In cases where the disease breaks out in a healthy 

 field the diseased area should be isolated by surrounding 

 it by a trench a foot deep. 



4. Cuttings should be carefully selected and soaked 

 in Bordeaux mixture for at least six hours and then 

 tarred at the cut ends. 



Diagnosis : — Gregarious or fasciculate at the base, 

 variable, flesh membranaceous, persistent ; pileus white, 

 broadly campanulate, then dingy white and plane or cup- 

 shaped, 15mm. diamr. ; gills white, simple or bifurcate; 

 stem central, white, 15mm. long, apex tubiform, base 

 villous ; spores hyaline, continuous, irregularly oblong, ends 

 attenuated, rounded, 16-20 by 4-5 microns. 



Lewton-Brain : West Ind. Bull., Vol. VI., p. 34. 



Wakker and Went : De Ziekten van het Suikerriet 

 op Java, p. 194. 



Marasmius plicatus is reported to cause a root disease 

 of the sugar cane in Louisiana ; the same species, however, 

 occurs along with the sugar cane in Java where it is 

 considered to be harmless. 



MARASMIUS EOUICRINIS, Muller. 

 ^Horse-Hair Blight of Cacao.) 



The mycelium of the fungus appears like a tuft of horse- 

 hair caught in the twigs of the tree. Some of the threads 

 are closely attached to the bark, and the mycelium 

 resembles that of the " thread blight " in some respects. 

 The fungus is known to occur in the West Indies. 



Diagnosis : — White to yellowish, pileus membranaceous, 

 convex, obtuse, 1-2 mm. broad ; stalk 1 cm. or more 

 long, bristly, rigid, black, shining, rising from the black, 

 horse-hair-like mycelium ; lamellae few, separated, paler 

 than the pileus. 



Lewton-Brain : West Ind. Bull., Vol. VI., p. 87. 



STOCKDALE : West Ind. Bull., Vol. IX., p. 179. 



Cooke: Grevillea, Vol. VIII. 



Marasmius sarmentosus, Fr., is the cause of the horse- 

 hair blight of the tea plant and of several forest trees in 

 Ceylon. 



Marasmius sp. ; the root disease of the sweet potato, and 

 also of the Guinea corn, imphee and Indian corn, is thought 

 to be caused by a species of Marasmius. 



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