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CACAO 187 



other and more dangerous organisms. It has been 

 reported from Dominica and St. Lucia. 



It is much more severe in damp, shady places than 

 in the open, and under conditions of excessive moisture 

 it sometimes attacks the larger branches. Proper drain- 

 age and the reduction of the shade will usually prove 

 an efficient remedy. The diseased parts should be cut 

 and burned, and the wound painted with tar or white 

 lead. Where the trees demand a more radical treatment 

 they should be washed with a preparation made as 

 follows : 



7| Ibs. slacked lime. 



2 Ibs. sulphur. 

 10 gals, water. 

 Boil until of a red colour and allow to cool. 



Bark Disease. (Corticium javanicum, Zimm.). 

 This fungus is the cause of a bark disease which 

 frequently kills small branches, but is not severe in 

 the large ones. It is very similar to the disease caused 

 by C. lilaco-fuscum, Berk, and Curt., and causes its 

 greatest damage by opening up roads for other fungi 

 which cause more severe diseases. It should be treated 

 in the same manner as the preceding disease. It has 

 been reported as common in Java, Ceylon, and Southern 

 India. 



Another bark disease, which is due to Eutypa 

 erumpens, Massee, attacks the cacao, nutmeg, some 

 species of Ficus, and other trees in Trinidad, Barbadoes, 

 and Grenada. It is probably a wound parasite. It 

 causes irregular black patches of stroma with a dull 

 rough surface, in which are sunken the perithecia. On 

 cutting into the wood below these patches will be found 

 irregular black streaks running more or less longitudi- 

 nally, and scattered, small black patches. A very similar 

 disease of the Para rubber occurs in the Malay States, 

 and is caused by E. caulivora, Massee. 



Thread and Horse-Hair Blight. This disease is due 

 to the sterile mycelial threads of either of two species of 

 Marasmius : M. equicrinus, Mull, and M. rotalis. 



