KKillTKKXTir ANM'AL K'KI'OK'T OF STATE ENTOMOLOGIST 7 



inllicted a kjss of v'^l lo. H.') in this one comparatively small territ<a"y. 

 .\ltliou,i;h these losses took place on irrigable land, no water was 

 axailahle until after the first of June. Were it not that irrigation 

 made it possible in some cases to reseed and grow a late crop on 

 part ( f the originally destro}-ed area, the loss would have l)een 55 

 per cent instead of -18 per cent of the acreage in that district. 



I'armers generally throughout Montana should realize that the 

 luile western cutworm is a pest oi the iirsl magnitude, ranking with 

 the alfalfa wee\il and others of great power of destruction. 



This insect came into prominence for the first time in ] !M 1 in 

 tlic southern part of the province of Alberta, Canada, A\here several 

 hundred acres of grain were destroyed and where in the folk^wing 

 year the estimated loss was between 30,000 and 35,000 acres. The 

 llrst record of its occurrence in Alontana ^vas in the northeni part 

 (if the state in IIM.k Since that time it has been spreading south- 

 ward and in 1920 was found to occur quite generally over that part 

 i'\ Montana east of the continental di\ide, with the exception of 

 some few districts in the southern part of the state. 



iv.ery effort is being made to find a remedy for this insect and 

 the director of the ILxperiment Station has been as lil:)eral as possible 

 in the allowance of research funds to this department for studying 

 this insect. AA'e are glad to report that some progress has been 

 made and that a pul:)lication dealing with what is known about this 

 insect and methods for its control has just been isstted and is now 

 a\'ailal)lc for distribution. 



FKUTT-TREE LEAF-ROLLER 



The Iruit-tree leaf-rtiller or Colorado leaf-roller, as it is sijme- 

 times called, {.iTcldps ni-Qh/ros/iiJa ) is doing serious and rather 

 extensixe damage to apple trees in the Hitter Root \'alle\-. C}ur 

 attention was first called to it during tlie spring of 1920 when reports 

 of its ])resence and the damage it was doing were brought hi our 

 notice from Ra\alli County. 



The eggs of this insect are laid by the parent moth on the bark 

 of the apple tree during July and hatch in the early spring just as 

 the leaf buds are unfolding. The very minute worms go to the 

 buds and soon secrete themselves by burrowing among the tender 

 lea\es. .\s the leaves expand the worms web them together 

 and remain liidden. Tt is characteristic of this insect to ai)])ear in 



