34 THE LARCH CANKER 
large intercellular spaces. All the cells in the neighbourhood 
of the fungus are killed by secretions, and the fungus follows 
these secretions. and feeds on the cells which have been 
killed bythem. The further development of the canker can 
best be followed by reference to the accompanying diagrams. 
D E 
Fic. 12.—Diagrams showing stages in the development of a canker: 
4, first spring; B, first autumn; c, second spring; D, third spring; 2, 
fourth spring. For description, see text. 
Fig. 12, a, shows a transverse section of a three-year- 
old stem in which a portion ‘x’ has been attacked and 
killed by Dasyscypha. In the spring of the first year the 
fungus has not reached the cambium, but is near enough to 
the section aB of the cambium to have affected it and 
caused it to make the abnormal wood aB of fig. 12, B. 
This latter figure shows the state of affairs at the end of 
