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conventions. A tree attacked by Dendroctonus in this state 

 Generally turns yellor; with the tips of the "branches or tops 

 of the tree still reon and you may depend upon it that if 

 the tree sho^s any green most of tho ''bro^ci ie still there, 

 if not all of it. .llso, if the pitch tuoes are visiole, 

 (and they are not always Yisihlo) you may "be sure the tree 

 is infested even if still sreen and shelving no sign of turn- 

 ing yellow. 



In the Blaol: Ellis it was only found necessary to 

 "barlr tho trees to liill the "beetles (according to DrHopliins) , 

 "but ~jhis was "bocc-use the "beetles pupated "botween the tree 

 and the "barlt; "but in the cr-se of our western pine "beetle it 

 pupates in the outer "bar!-: and oc.nriot "be eirposed "by "barking 

 the tree. Therefore, in the case of an infested tree, tho 

 tree should he cut and "barrod from 1/2 to 8/3 of its longth 

 from the utump, acjcordiiig to the amount of limos on the tree, 

 The lim"bs and "barli should than he piled ovor tho un"bar v :ed 

 top and the whole of the slash "orned. Care should alv/ays 

 "be tahon to ra.:e up all the "bar::, as ovsn small "bits an inch 

 indiameter sometimes contain half a dozen "beetles, 



Alnost all the raners h^ve aroas of this so-called 

 "normal" infestation and I do not see why they cannot r;et 

 rid of a larc;e part of it each fall or oarly spring until 

 t: e word normal ac a;/_lied to infestation hecomes obsolete. 

 Here also Y, Q can have a saYiiiG i"^ o-ctual dollars and cents. 



63 



