THE DOUGLAS FIR. 387 



Deer and roebuck are detrimental to the Douglas fir, more 

 especially on account of their peeling the bark. 



It is not possible to say at present in how far Douglas fir is 

 likely to suffer from insects in Europe. It is attacked by a 

 number of those which prey on the indigenous conifers, but 

 further experience must show the extent to which it is likely 

 to suffer from such attacks. Of fungi, Botrytis Douglasii 

 kills the young shoots, and Agaricus melleus and Tmmetes 

 radiciperda have been found on the tree. 



The thinnings of Douglas fir woods should be light for a 

 considerable period, so as to cause the lower branches to die 

 off, and the formation of cylindrical boles. 



