DISEASES OF TAXODIUM AND LIBOCEDRU8. 



Hum, which, however, did not grow. Fresh pecky wood 

 has been kept in moist chambers now for almost three 

 years without any sign of growth. Further experiments 

 are in progress. 



PROPAGATION OF DISEASE. 



The constant presence of the colorless mycelium in dis- 

 eased trees makes it seem probable that this is the vegetative 

 part of a fungus which causes the decay. As has been 

 said, no fruiting organ has yet been found, so the manner 

 in which this disease is carried from tree to tree is still to 

 be discovered. A large number of logs were split open, 

 and in some of these, large places were occasionally met with 

 where an old branch had been healed over, leaving a cavity. 

 In this cavity dense white felts of the mycelium, in which 

 numerous crystals of calcium oxalate were imbedded, were 

 obtained. There was, however, no sign of a fruiting 

 organ. In some boards beginnings of such felts were found 

 but none of these have developed any further. Reasoning 

 by analogy from the diseases of trees already known we 

 ought to find at some time a pileus of some sort. That 

 infection takes place through a broken branch or some 

 part of the top of the tree is most probable. Many trees 

 were cut down in which the "peck"' could be traced 

 directly to a broken branch, extending up and down from 

 this point. This was especially marked where, as in a 

 number of instances, the " peck " was confined to one side 

 of a tree. 



LOCALIZATION OF DISEASE. 



The most characteristic feature in connection with this 

 disease, distinguishing it from others so far described, is 

 its peculiar localization, i. e., the destruction of the wood 

 in distinctly localized areas. The formation of the holes 

 has been described, and it has been noted that the contrast 

 between diseased areas and sound wood is a marked one, 



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