206 MONTANA EXPERIMENT STATION. 



crawl to the twigs, spin the temporary cocoons which they occupy 

 during the winter months, and from which they issue in the spring 

 and pass to the buds as previously stated. 



THE KINDS OF TREES THE BUD MOTH ATTACKS. 



While this insect is best known as an apple pest, it feeds also on 

 pear, plum, quince, peach and cherry trees and on blackberry busheSy 

 in all cases feedinsf on the buds. 



*J3 



MEANS OF DISTRIBUTION. 



The manner of hibernation of the insect makes it very easy for it 

 to be distributed on nursery stock, and this is doubtless the way in 

 which it has become so widely distributed. It may be readily dis- 

 tributed on scions. 



The moths are capable of flying and doubtless go from tree to tree 

 and from orchard to orchard but they can only spread slowly in this 

 way. 



NATURAL ENEMIES. 



It is very probable that many of these insects fall a prey to the 

 birds that frequent the orchards. In fact it is reported that birds 

 sometimes eat the moths. There can be little doubt that the Ore- 

 gon chickadee, that is so common in the orchards searching on the 

 trees for food, does much good in destroying these insects. Various 

 other birds probably eat them in Montana. 



It was very noticeable that the tree which had been inclosed in the 

 cage in Missoula for one year was much more seriously affected by 

 this insect. Birds had, of course, been excluded. 



A number of parasites have been taken from the bud moth in the 

 United States and in Europe but just how much good they do can- 

 not be stated. I have reared an undetermined species from speci- 

 mens of this pest brought from Missoula to Bozeman for study. 



METHOD OF PREVENTING ITS RAVAGES. 



In the East this insect is said to be a very difficult one to control. 

 Just why this is so has never been fully explained, and as yet we 

 lack a sufficient knowledge of the habits to enable us 



