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Prevention of Injury 



The injury can be prevented "by adopting one of the following 

 methods : 



When possible, delay the cutting of the trees for log cabins 

 until fa.ll (Octoher to November) when the insects are not active^, and 

 place the logs at once in open piles, either off the ground or under cover 

 in such a manner as to offer the "best facilities for the rapid and thor- 

 ough drying of the inner "bark. This will prevent attack "by most insects. 

 To insure the maximum amount of protection, however, the logs should be 

 sprayed the following spring when the insects "become active. This method 

 is especially recommended where it is desirable to retain the "bark on the 

 wood. 



'When it is necessary to cut the trees during the spring or summer 

 months, treat them as soon as cut with a solution of coal- tar creosote, 

 grade 1 liquid oil, 1 part, to kerosene, 3 parts. Before use it should 

 be strained through "burlap. The creosote stains the wood very little when 

 diluted in this way. 



When the treatment of the "bark with creosote is objectionable, and 

 the bark can be readily peeled, remove the bark from the tree in strips, 

 treat the wood with the creosote and kerosene mixture, and replace the 

 bark, using large-headed nails. This will prevent insect attack and pre- 

 serve the rustic appearance of the wood. 



"Where the bark is not especially desired, fell the trees at any 

 time of the year, although preferably in the fail, remove the bark, and 

 brush the logs with creosote. This will give them a pleasing stain. 



kVood used in the manufacture of rustic furniture should be cut 

 during the fall and winter months and removed from the woods to a place 

 of protection before insect activity begins in the spring. 



R. A. St. George, 



Assistant Entomologist. 



Approved : 



J. C. CKAIGHEAD, 



Entomologist, in Charge of Eorest Insect Invest iga-tions. 



1. The period of Insect activity about Washington, D. C. , extends from 

 April 1 to October 15. Farther north insect activity would begin from two 

 to four weeks later and end from two to four weeks earlier; farther south 

 the season would begin two to four weeks earlier and end that much later. 



