162 MONTANA EXPERIMENT STATION. 



THE STRAWBERRY CROWN MOTH. i. 



The Strawberry crown borer is a dangerous enemy to the straw- 

 berry, blackberry, and raspberry. The adult is a member of the 

 group known as clear winged moths on account of the transparency 

 of the wings. They resemble wasps in their form, markings, and 

 actions. 



This species appears to be native to the United States and has 

 been recorded by the Bureau of Entomology at Washington from 

 California, Nevada, Colorado, and Texas. 



A lady from Stevensville, Montana, made complaint of what is 

 very likely this insect but no material could be obtained from which 

 to make a determination of the species though an insect which was 

 plainly a Sesiid from the manner in which it left the pupa shell" 

 protruding from the stems just above the earth. This pest had 

 practically destroyed her entire patch of blackberries. 



This again is one of the insects which is liable to be introduced on 

 nursery stock. The partly grown larvae pass the winter in the 

 crowns of the host plants. Just before the emergence of the moths 

 the pupa works itself part way out through the opening previously 

 constructed by the larva and the shell of the pupa is left at the 

 opening when the moth departs. This is an insect that is not easy 

 to control and its advent should be guarded against. 



THE WOOLLY APHIS. 



The woolly aphis is an insect much feared by fruit growers but 

 after six years of experience in the state of Montana during which 

 time we have learned of its presence fairly common in the state we 

 feel warranted in saying that under the climatic conditions found 

 here this insect will probably not be a serious pest. However, it 

 is warrantable to watch for it and deal vigorously with it when 

 found. 



Two forms of the insect exist, an areal form feeding on the parts 

 of a tree above the earth, and a root form feeding on the smaller 

 roots on which they produce irregularly shaped galls. 



The areal form often attacks partly healed wounds in the bark. 



I. Sesia riitilaus H. Edw. 



