232 Peach-Growing 



Methods of control of bark beetle. 



The methods given for the control of the fruit-tree bark- 

 beetle are applicable to the control of this insect. 



Peach twig-borer, or peach-worm (Anarsia lineatella) 



This insect is commonly called the peach twig-borer in 

 the eastern states, but as its most serious damage in the far 

 West is caused by the larvae entering the fruit, it is there more 

 often termed the "peach- worm." It is the common cause 

 of "wormy peaches" on the Pacific coast rather than the 

 larva of the curculio which makes "wormy peaches" east 

 of the Rocky Mountains. 



Appearance. 



The adult insect is a small moth with a wing expanse of 

 about i inch. The larva is pinkish or brownish in color, 

 and when full grown is ^ inch or less in length. There are 

 two or three generations during the season in the West. 



Distribution. 



The peach twig-borer Is an insect of European origin. 

 It has become widely distributed throughout most parts 

 of the country during the nearly fifty years since it was 

 first observed here. 



Life history and habits. 



The insect passes the winter as a minute partially grown 

 larva within a silken lined cell in the spongy bark at the 

 crotches of the limbs. The location of the cell, frequently 

 several placed closely together in the same crotch, is in- 

 dicated by the presence of very small mounds of finely 

 powdered particles of bark. 



