CONTROL OF CODLIlsTG MOTH IN COLOEADO. 37 



more long, 10-ounce bill-posting tacks, tinner shears, a claw hammer, 

 tar such as that used for roofing purposes (sometimes called "pitch 

 tar"), a melting pot or a small pail conveniently arranged over a 

 flame, and a small dauber. 



The strip of folded burlap is then placed completely about the 

 trunk of the tree to be trapped. It may be placed at any convenient 

 height between the lowest limb and the ground, and an overlapping 

 of an inch or two should be left to allow for the expansion of the tree. 

 The loose bark should be scraped from the trunk, lower branches, 

 and the crotches of each tree on which the codling-moth trap is ap- 

 plied in order to destroy as many places as possible where the codling- 

 moth larva might spin its cocoon and there transform to the adult 

 or moth stage. The burlap should be held in place by slate nails 

 about an inch in length driven in at several points around the tree 

 trunk so that the head projects not less than half an inch beyond the 

 burlap, preferably three-fourths of an inch. This is essential in 

 order to hold the wire safely away from the burlap at such a distance 

 as will prevent the pup?e, just before the moths emerge, from wriggling 

 up to or through the meshes of the wire and the moths from emerging 

 on the outside of the trap. 



With the burlap in place and the slate nails in their proper position, 

 the wire screen, as prepared above, is ready to be tacked into place. 

 Start at any convenient point and in any convenient direction 

 around the tree by putting one tack in the corner on the lower edge 

 of one end of the wire-screen strip, holding the strip so that the 

 burlap band will be in the middle. Then place a tack in the comer 

 on the upper edge, shoving down on this edge slightly, so as to spring 

 the wire away about 1^ inches or more from the tree at this point. 

 Proceed around the tree trunk with the wire, holding it so that the 

 burlap will be in the center all the way around and placing just 

 enough of the 10-ounce bill-posting tacks along the edges of the wire 

 to hold it snugly to the tree at all points, particularly where there 

 are slight depressions or hollows which can "not be sealed over with 

 the tar, as outlined below. 



Here care should be taken not to stretch the wire while it is being 

 tacked to the tree, as this will pull out the crimp and make the for- 

 mation of a desirable bulge rather difficult. Care should also be 

 taken while the wire is being tacked into place to push the two edges 

 together somewhat in order to increase the bulge already made by 

 the crimping. This bulge should be large enough so that the mid- 

 dle of the strip will be approximately 1 inch from the burlap at 

 every point. It is entirely possible to produce a bulge of over 2 

 inches, provided the wire is properly crimped and the edges are 

 pushed together in the proper fashion. A little practice, however, 

 will develop considerable skill along this line. An overlapping of 



