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The Bronze Birch Borer, Agrilus anxius, is the most destructive 

 enemy of imported white birches in parts of Eastern Canada. The adult 

 is a rather slender brownish beetle, nearly one-half an inch in length. 

 The grubs which cause the injury are slender whitish borers to be found 

 excavating their tunnels in the inner bark of the trunk and Lrcnches of 

 infested trees. The tunnels are very elongate and winding, and eventu- 



White birch; the top killed by the bronze birch borer. 



