THE LOCUST BORER. 13 



III fiu-t, it is the wiiti'i's opinion that, with this prociiutioii properly aiicl 

 continuously carried out. locust may he successfully ])rotected from 

 the borer in any locality. 



Sl'RSEQl' HNT M A N A( ; KM KNT. 



In the subsecjuent manaijement of planlation> and of natural forest 

 and sprout growth it is important each year to locate and destroy the 

 worst infested ti'ees for the ])urpose of killino- tiie borers in the wood, 

 and to conduct the thinning and connnercial cutting operations during 

 the period between November of one year and May of the next in 

 order to destroy the eggs and young be'ore they enter the wood. 



Worthless, scrul)l)y, borer-infested trees should be killed outright 

 b}- stripping the ))ark from 4 or 5 feet of the lower stem during 

 August to prevent sprouts and seed production from them and at th(^ 

 same time to destroy the eggs and young borers. Trees deadened in 

 this manner, as was demonstrated near Morgantown, W. \'a., some 

 years ago, may be so completely killed that not a single root sprout 

 will a]^pear. Therefore this method is of special value in j)reventing 

 >prout reproduction from inferior individual trees. 



COLLECTING THE REETLES FROM GOLDEX-KOir FLOWERS. 



Collecting the beetles from golden-rod tlowers. by means of insect 

 sweep nets, before they deposit their eggs, would be advisable, even 

 for the protection of large plantations, and, as has been suggested, the 

 planting of patches of the plant, or the cutting of all l)ut certain strips 

 and patches of natural growth for this purpose, would serve to con- 

 centrate the beetles where they could be caught in the nets and 

 destroyed by emptying them into a pail containing water covered 

 with a tilni of kerosene. 



POISONED UAIT. 



Experiments should al>o be made with pois<in<Ml t»ait^, as suggested 

 on pages 7-s. 



SUGGESTIONS FOR PROPAGATING BORER-RESISTANT TREES. 

 Il{(iM SKKI> (SKM Al. MKIIIODI. 



The fact that some trei's are. to a greater or less ext«'nt. inuinine 

 from attiick or injury by the bor«'r. while adjacent ones in the >aui»> 

 grove are attacked year after year and seriously damaged, suggested 

 the idea of breeding races and vaiieties of the species which woidd be 

 permanently inunune. This suggestion was included in tin* plan for 

 cooperative investigation mentioned on pages l-*2. It wa>- then thought 

 that if the seed for general planting wenM-ollect(Ml from inununo trees 



