THK LOCUST HOHKR. ^ 



nppojiis now that its attack is continod ontiioly to Kol)inia. It i> not 

 neoossarv that a tror or l)ranch shoiiUl be some inches in cliainottM- 

 before it is daniajifcd. foi- the writci- has found fnlI-L:r(>\\ m hirva- in 

 sprouts and l)ranci)es U'ss than one-half inch in dianietei'. 



In the writer's opiiuon, all attempts to cultivate locust in the eastein 

 United States .s/i<>>/A/ //^V hi <il>ini(i(nu'(t on accountof the borer. althouLih 

 tiiiy has b(^en reconnnended l)ysome recent writei-s. It has been >tated 

 tliat the locust would jjrobably uot b(^ injured by the borer in tiie 

 southern linut of its ran^e and in the country west of the (treat 

 Plains. While this may be tiue, precaution should be taken to pre- 

 vent its introchiction into such localities, since it is not improbable 

 that if the insect be introduced and ))ecome established it may prove 

 even more destructive there than in its natural home, as was demon- 

 strated in the Mississippi A'allev. 



Nearly all methods heretofore recommended are sui)ject to practical 

 application to shade trees and small plantations only; therefore there 

 is special need for suggestions of practical methods of combating the 

 insect and preventing losses in large commercial plantations and in 

 natural forest growth, and it is hoped that this paper will contribute 

 something of value along this line. 



OBSERVATIONS BY THE WAITER, 1890-1905. 



Adults were collecte(l on golden-rod flowers at Pie(hnont, Md., and 

 Mineral County, \\ . \ a., on August 25. I8*.tti. and on golden-rod and 

 locust leaves at Morgantown, W. Va.. September 10 and 17, 1MU,« 

 Young larva' werc^ found mining ii; living bark of trees at Kanawha 

 Station. W. Va.. May 1. ls'.»l. and on May I'o the same larva* had 

 entered the wood, but a great many htid died. 



It was frecjuently noted that the locust i?i the fore>ts of Chest^uit 

 Kidge in Monongalia and Pendleton counties. Lauicl Hill in Preston 

 County, a!id esjxM-ially on Rich Mountain in Randolj)!) County, W. \'a., 

 showed but slight damage by the liorers. Siniilai- obsei'x ations w»>re 

 made in many other sections of the State, whih* in near-by and widely 

 separated sections the flamage was found to have been sevei-»> and contin- 

 uous during the life of some of the oldei" trees. In iSltS it was observeil 

 that l)adl3' damaged shade trees near Morgantown. W. \ a., which 

 had been .severely pruned in .March and April, had reco\(Med. and the 

 crowns were renewed by dense, vigorous, healthy growth, which sug- 

 gested this method of treating badly damaged shade trees. 



On Octol)er It. llt()4, it was fo\nid that the locust in the vicinity of 

 Chevy Chase, .Md.. was ])ut slightly damagerl by the borer, although 

 beetles were found in numbers on golden-id(| and feeding on sap from 

 wounds in bark of living sumac. This haliit of feeding on sap is of 

 special interest from the fact that it suggests the possibility of killing 



