126 MONTANA EXPEBIMENT STATION 



the}'- were completely controlled by banding the trees with Tangle- 

 foot. 



Codling Moth {Cydia pomonella L.). In the vicinity of Billings 

 and Park City the codling moth was more abundant than ever 

 before, and is year by year becoming more common in ^Montana. 



The Oblique-banded Leaf Roller {drcJiips rosaceana Harris). 

 I'his was reported in 1912 as a greenhouse pest. This season it was 

 discovered in an apple orchard at Victor. The foliage was quite 

 badly eaten, and judging from the masses of eggs that were depos- 

 ited serious injury may be expected another year. We have also 

 found it feeding upon cottonwood. 



The Imported Cabbage Worm {Pieris rapae L.). This is by 

 far the most abundant of the various cabbage worms. Its life history 

 and control have been explained in an illustrated circular which is 

 now being distributed. 



Canker Worm {Alsophila pometaria Harris). While this is 

 one of the oldest and best known pests of eastern orchards, it is 

 not generally known that it occurs in Montana. Reports of injury 

 that corresponded to canker-worm work has been coming to us for 

 several years from Fromberg and a trip to that section confirmed 

 our suspicions that the above named pest was doing the damage. 

 iii several orchards the foliage appeared as if scorched and no fruit 

 was set. A simple method of control is to band the trees with 

 Tanglefoot ; this catches the wingless females as they climb up the 

 trees to lay their eggs. The Tanglefoot should be applied early in 

 the spring as the females emerge from the ground on the very first 

 warm days. 



Mediterranean Flour Moth {Ephestia Jcuehnlella Zell.). Flour 

 badly infested with this pest was sent to us from Bozeman. 



DIPTEEA 



The Lip Bot Fly (Gastrophilus haemorrhoidalis L.). For some 

 time horses in eastern Montana have been attacked during the 

 summer months by what has been designated as the "nose fly"- 

 When attacked, horses became frantic, causing many accidents and 

 serious interruptions of farm work. The fly flies near the ground, 

 frequently between the fore legs, and then suddenly darts at the 

 lips where the eggs are deposited instead of in the nostrils as is 



