Insects, etc., Injurious to the Plum. 367 



TBEATMENT. 



Spraying, as for the Apple Tortrices, only directly after the plum 

 blossom has fallen. 



THE SHOT BORER BEETLE. 

 {Xyleborus dispur. Fab.) 



The beetle dealt with here now and again occurs in such numbers 

 that serious loss is occasioned. 



Its popular name, Shot Borer Beetle, is derived from the curious 



[F. Edenden. 



FIG. 241. SHOT HOLE .BORER (Xyleborus dixpar). 

 Showing long gallery A. 



shot-hole like opening it makes in the affected trees, and the habit of 

 many remaining in one tunnel when hatched, completely filling it 

 up like a line of shot. The working is very different from the Bark 

 Beetle (p. 111). This beetle drives long tunnels into the heart of the 

 wood. In young trees they partially ring them, and the result is 

 death of the upper parts ; in older trees the long tunnels they drive 

 into the substance of the trunks and boughs interfere with the 

 normal flow of the sap. When attacking small growths they may 

 tunnel right up to the central portions. 



It is by no means confined to fruit trees, for beech, maple, 



