38 BULLETIE" 959, U. S. DEPARTMENT OF AGRICULTURE. 



several inches should be left when the wire has been completely fas- 

 tened around the trunk of the tree, and this overlapping should be 

 stretched slightly over the wire beneath, so as to make a tight joint. 

 If, as pointed out above, care is taken to produce a bulge sufficient 

 to hold the wire well away from the burlap, to fit the wire snugly to 

 the tree and make the overlapping tight, the codling-moth trap will 

 remain in perfect operation throughout the season. It will then be 

 practically impossible for the pupse, just before the moths emerge, 

 to work their way up to the wire, allowing the moths to emerge on 

 the outside of the trap, a thing which is sure to happen when the 

 wire is close to the burlap. 



Care should be taken that there are no openings between the wire 

 and the tree trunk through which moths may escape from the trap. 

 These can be prevented by placing a thin coating of ordinary roof 

 tar over the edges of the trap. This is a very practical and con- 

 venient method of making traps moth-tight. The tar can be con- 

 veniently melted in a small melting pot or pail held over a flame and 

 can be applied best by means of a small stick with a bit of cloth on 

 the end. Tar can not be applied easily with a brush. In applying 

 the tar, roll the stick or the dauber toward the tree as it is passed 

 along the edges of the trap. The tar need not be applied until 

 shortly before the time the first moth of the first brood emerges. 



Maintenance. 



When once attached to the tree as outlined above and carefully 

 sealed with tar, the codling-moth trap should remain in perfect oper- 

 ation throughout the season and should require very little atten- 

 tion. In some cases an inspection the following spring to close up 

 any holes which may have formed will be sufficient to put the trap 

 in condition for another year. 



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