SMITHSONIAN INSTITUTION LIBRARIES 



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ordinary primings, should l)e placed al)()ut the orchard where infesta- 

 tion is most feared. Apple and pear would prol)ably prove most useful 

 for the purpose because apparently most favored by the borer. In the 

 application of this remedy it is essential that the operator shall know 

 the dates of the tirst appearance of the different broods of the l)ark- 

 beetle in his particular locality. 



Left about the orchard as previously described, the decoy material 

 will attract the beetles, appearing (in the District of Columl)ia) in late 

 March and April, and after thej^ have deposited the bulk of their eggs it 

 should be destroyed by burning, say, four or five weeks after the beetles 

 first appear, to prevent the developing of other generations, and a 

 new lot of liranches should be provided by pruning injured or super- 

 fluous material to attract the next generation of beetles, which appears 

 about the first of July. The last-appearing l)eetles, which are active 

 about the first of .September, must be trapped again in the same man- 

 ner. The greatest care should l)e used in all cases to destroy' trap and 

 other infested material before the issuance of the beetles. 



Considering the efficacy of parasites in the control of this insect, it 

 might be found valuable to inclose pieces of infested In'anches in boxes 

 or barrels covered with wire netting of a, mesh sufficiently fine to pre- 

 vent the beetles from issuing, but to allow the parasites to make their 

 exit and thus to keep up their go(Kl woik in the control of the pest. 



Kerosene; rveosote oil. — The beetles may be killed and mucli con- 

 sequent damage prevented, if they are detected at the outset of attack, 

 by touching lightly the infested spots, from which the gum or sap has 

 l)egun to ooze, with a small sponge saturated with kerosene, creosote 

 oil, or turpentine, and fastened at the end of a stick or iiole. After 

 destroying the beetles in this manner upon a tree, it may be pro- 

 tected from further attack by paper wrappings, and, should it show 

 signs of serious injuiy, this might be averted, if the tree be too dry, by 

 frequent waterings where this can conveniently be done, to the l)ase of 

 the trunk. 



Approved : 



James Wilson, 



i^ecrcidyij. 



Washington, D. C, March 2.-7, 1903. 



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