334 



AGRICULTURE. 



helpers in keeping boring insects in check- 

 such as woodpeckers, ichneumon-flies, Chalcis 

 flies, etc. In combating all kinds of borers an 

 ounce of prevention is, indeed, worth more than 

 a pound of cure. Prompt removal of all dead 

 or dying trees is a necessary measure. The 

 most effective preventive is to wrap the base of 



FIG. 122. Saperda Candida, Fab. 



a Puncture in which egg is laid, b Same in section, e Hole from which 



beetle has emerged, f Same in section, g Pupa in its cell. 



(After Riley.) 



the tree trunk for about a foot and a half with 

 wire gauze netting, or, what is cheaper, wooden 

 wrappers obtained from box and basket fac- 

 tories. They should be pushed down into the 

 ground so that the beetle cannot get under to 

 lay its eggs, and the tops should be tightly filled 

 in with cotton batting to keep them out. The 



