40. BULLETIN NO. 64. 



THE SUGAR BEET WEBWORM, Loxostege sticticalis Linn. 

 Family Pyralid.^, Order Lopidoptera. 



This important pest of sugar beets was found in a few beet 

 fields west of Billings. A few fields were so eaten by the caterpil- 

 lars that the foliage turned brown and the beets appeared to be about 

 dead ; yet a few weeks later they recovered their normal appear- 

 ance by putting forth new leaves, and in the fall, while not looking 

 as well as beets that had not been so eaten back, they produced 

 beets of good size. The effects of this insect were most prominent 

 about June 20th. The same insect was also sent in from Chinook 

 by W. D. Smotherman. 



The presence of this insect in Montana is of considerable in- 

 terest to growers of sugafr beets in Montana and a considerable in- 

 jury is liable to be done by it if it shows a power to produce more 

 than one full brood. 



THE CODLING MOTH, Qydia pomonella Linn. Family 

 ToRTRiciD.B. Order Lepidoptera. 



This pest, which is, with good reason, more dreaded by apple 

 growers in Montana than any other, has been reported from two ad- 

 ditional places during the year. Mr. Manley, of Pony, found his 

 apples to be wormy this season, and it is also reported to be present 

 in the Stillwater valley south of Columbus. 



A CUT-WORM ON LAWNS. Carneades rube facialis Grt. 

 Family Noctuid.^, Order Lepidoptera. 



We received word a number of times in the spring of the year 

 that cut-worms were very abundant in lawns and gardens in Boze- 

 man, and specimens taken from the lawn on the College campus 

 developed into a moth which, through the kindness of Dr. L. O. 

 Howard, of the U. S. Department of Agriculture, was determined 

 as this species. In some cases lawns had been injured, we were 

 told, by these caterpillars. 



THE CABBAGE PLUTELLA, Plutella maculipennis Curtis. 

 Family Yponomeutid^, Order Lepidoptera. 



Cabbage and related garden plants are subject to the attacks 

 of several very serious insect pests, and among these the cabbage 

 plutella is least known of all. The small fusi-form, pale green 



