THK LOCIST HOKF.K. 



11 



It should bo nMiicnilKMvd that all tlic holes found in a tree and all 

 otliei' damage hy the l)orer are not the work of one genei-ation, hut 

 usually that of re[)eated annuiii attack during the life of the tree; 

 also, that a hurrow in the sapwood of a young tree remains the sanio 

 burrow in the heartwood of the old tiee. without change, except in 

 the healing (d" the original entrance: therefore th<> nund)er of borers 

 and the amount of damage each year is not 

 so great as it nught ai)pear, and, while each 

 female is doubtless cjipable of depositing 

 more than a himdred eggs." it woidd ap- 

 pear from the writer's observations that 

 only a small percentage of the larvte hatch- 

 ing frt)m them survive the bark-infesting 

 stage or com[)lete their development to the 

 adult stage. This suggests that any method 

 of management which will insure the de- 

 struction of a large numl)er of larviv and 

 beetles each year will reduce the damage 

 to a point where thiM'o will b(^ practically 

 no loss. 



SUGGESTIONS FOR CONTROLLING THE 

 INSECT AND PREVENTING LOSSES. 



With our i)resent knowledge of the life 

 history and hal)its of the locust borer, it 

 would a})pear that the following sugges- 

 tions ndght be of practical value in the 

 control of insects in large plantations anfl 

 forests. 



The fact that the young larva' from (>gg> 

 deposited during the summer remain in the 

 outer bark during the winter and do not 

 enter the wood until the following May 

 suggests that if locust for all purposes were 

 cut l)etween November and May. the bark removed fiom that portion 

 which is of value, and the remainder burned, it would destroy vast 

 numbers of the insects and contrilnite greatly toward the protection 

 of the remaining growth. 



The fact that badly infested trees may l>e detected during May. 

 »lune, and .hdy by the (^ject«d .sap and borings, suggests this sim|)le 

 method of locating such trees, which should be cut close to th(^ ground 

 and burned, before the lirst of August, to (h^strov the borers before 



Kiii. 6.— Thf locust boriT \V;/lliiii- 

 rt>biiii;r): Uuprrxluctive orffHUs <if 

 fi'miilc Ijeetle. Highly ninpnilieil 

 (original). 



"An examination of tlu- oviiiifs (fig. 6) of beetles lolleeted in .\ugu»t .«Iu>\vh tliat 

 they may contain a.s many u.s iifty matnre eggs at nne time, in a<ldition to a large 

 nnmher of inimatiire ones. 



