Bolls which are attacked when young do not mature ; 

 older bolls may have only a small part of the lint affected. 



No infection experiments appear to have been conducted, 

 so that the cause of the disease is at present doubtful. 



ATKINSON : The Cotton Plant, p. 310. 



Lewton-Brain . West Ind. Bull., Vol. IV., pp. 265 

 and 345. 



BLACK BOLL OF COTTON. 



Occurs in Montserrat and in Antigua. 



The symptoms may be described as follows : — 



The decay of the internal parts of the boll commences 

 near the base, the seeds swell up and the lint is destroyed. 

 The bolls are practically spherical and taper to a sharp 

 point ; they are, as a rule, shed without opening. 



A short, non-motile, rod-like bacillus has been found in 

 the diseased bolls, but no experiments have been 

 conducted for the purpose of ascertaining whether this is 

 the cause of the disease or not. 

 Lewton-Brain : West. Ind. Bull., Vol. VI., p. 119. 



BANANA LEAF BLIGHT. 



This disease was first observed in Jamaica. A browning 

 of the vascular strands first occurs ; this is followed by a 

 blackening of the leaf blade and decay of the whole leaf. 

 The new leaves are attacked in turn as soon as they make 

 their exit from the terminal bud. 



The disease has been attributed to a bacterium. 



Earle : West. Ind. Bull., Vol. IV., p. 6. 



BUD ROT OF COCONUT. 



The disease is said to occur in Jamaica, Cuba, British 

 Honduras, Trinidad, and British Guiana. 



The yellowing and dropping of the outer leaves, which 

 are closely followed by shedding of the nuts, are the 

 primary symptoms. The whole terminal bud becomes 

 rotten and the plant dies. 



There is no evidence to show that this disease is of 

 bacterial origin. 



West. Ind. Bull., Vol. VI., p. 307. 



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