INSECTS OF THE PEACH 



273 



usually the larvii? confine their work to the trunk or the roots 

 of the tree, a short distance below the surface of the soil, but 

 occasionally they are found 5 or 6 inches under the ground. 

 When the larvie are full grown they leave their burrows and 

 spin a cocoon, coming out as adult insects in three or four 

 weeks. 



Fig. 117. — Canker on the limb of the peach. 



The only sure method for the control of this insect is to dig 

 the larvae out of their burrows with a sharp knife or some 

 similar instrument. A wire can often be used to kill the 

 insects in their burrows. The burrows of the borers are 

 usually indicated^ by conspicuous masses of gum together 

 with the_castingXand che wings of the insect. After the 

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