3. Felling and limbing infested trees in a north-and- 

 south direction and after they have lain in this position a few days 

 turning them completely over. This is practical only in a well ex- 

 posed, sunny situation. After a"bout three days of hot sun the in- 

 sects are all killed on top and by re turning and rolling the logs 

 so as to expose the other side to the sun an effective killing of 

 the beetles on this side also can be obtained. 



k, Felling and barking infested trees 'and burning the 

 bark and tops. 'This method is dangerous in the summer without 

 extreme precautions to avoid fire but is practical for winter 

 control. 



Whatever the. method, it is essential that all trees containing 

 the living insects be treated. Some of these will still have 

 green foliage (in which case boring dust or pitch tubes on the bark 

 are evidences of attack) or foliage that has faded only slightly. 

 After the foliage has turned brown (except where it has turned late 

 in the fall) the insects have abandoned the trees. 



All portions of the main stem up to a minimum of 2 or 3 inches 

 in diameter should be treated and the limbs either scattered about 

 so that they will be exposed to the sun and quickly dry out or else 

 burned. 



Do not treat trees (except for the purpose of salvage) if the 

 bark shows innumerable small holes such as might be produced by a 

 load of shot. The beetles have left the bark of such trees. 



Prompt action is necessary. The earlier and more effective- 

 ly and persistently the work is carried out the better should be 

 the results. 



Cooperation of adjacent owners is necessary. It will do little 

 good to clean up one area if adjacent timber acts as a source of re- 

 infestation. 



For more detailed advice, and personal examinations when possi- 

 ble, get in touch with the Bureau of Entomology Field Station, Box 

 l^lS, Asheville, N. C. All assistance is given free of charge. 



F. C. CEAI&HEAD 

 Entomologist, In Charge of 

 Forest Insect Investigations. 



