40 



CONTROL MEASURES. 



Logs which are sawn the first winter after cutting are usually but little 

 injured; most of the tunnels come away with the slabs. The serious loss is to 

 logs and fire-injured timber left out of water for several years. Logs placed 

 in water within a month from cutting will be mostly free from injury. Logs 

 barked within three weeks from cutting will be entirely free from injury. The 

 beetles do not deposit eggs upon bare wood, and the young grubs apparently 

 require the softer inner bark for their first food. Logs which are loosely piled 

 in the open shortly after cutting escape serious injury if the bark dries rapidly. 

 Covering the logs thickly with brush affords some measure of protection. 



