THE WHITE-PINE WEEVIL 



193 



part above the topmost whorl, but cases have been frequently observed 

 where the injury has extended below the second or even the third whorl 

 from the top. So great an injury may result in the suppression and 

 eventually in the death of the tree when it is growing in a close stand. 



I 2 3 4 S 6 7 8 9 10 n 12 



EXCESS or TERMINAL IN IKCHES 

 Fic. I. — Excess of the terminal shoots over the corresponding laterals 



The injury caused by the killing of the leading shoot may result in: 

 (i) A forked trunk, formed by two or more lateral bnmches tak- 

 ing the place of the single leader. Tliis may occur in dense stands. 



