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ulceration is to plant none but well matured suckers, 

 and to avoid giving them excessive moisture. 



Nor is the ulcer or canker confined to the sucker 

 of the pine apple, for established plants, if impro- 

 perly managed, are equally liable to its ravages. Mr. 

 Barnes says that it is the most destructive disease to 

 which the pine apple is liable. It makes its appear- 

 ance, in the first place, in the centre of the leaves at 

 the base, passing up the centre to the summit, at 

 first of a darker green colour than the other parts of 

 the leaf ; after which, during hot weather, it changes 

 to a ferruginous colour. If this disease is amongst 

 the fruiting plants when they start for fruit, it gene- 

 rally affects the stalk that supports the apple, cripples 

 it, and causes it oftentimes to shrivel up long previ- 

 ously to the fruit having reached the size it would 

 otherwise obtain. It is true, the fruit generally 

 colours, but remains deficient of its most essential 

 qualification. Numbers of such fruit were to be 

 observed in former days at Covent Garden Market 

 and in pine growing establishments, where a strong- 

 bottom heat was cherished and considered essential, 

 and where strong liquid manure was applied in a 

 thick form so as to stop up the few open pores of the 

 earth that there were under the fine soil system of 

 culture. Of one thing we are satisfied, viz., that 

 this disease does not appear among the pines that 

 are potted in open porous heathy soil, placed on a 



