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NATURE STUDY AND LIFE 



Beginning with the caterpillars under the bark of the 

 apple trees, the life story of the codling moth may be 

 briefly told as follows : The larvce change to pupae in May, 

 emerge as moths in late May or June, and lay their eggs for 



the first brood in June. 

 The larvae generally 

 crawl into the calyx 

 cup of the young 

 apples and eat their 

 way to the core, com- 

 plete their growth in 

 about three weeks, 

 commonly eat their way 

 out through the side 

 of the apple, and either 

 spin to the ground and 

 crawl to the trunk of 

 the tree or crawl down 

 the branches and make 

 their cocoons under 

 the bark again. This 

 occurs with the greater 

 number early in July.^ 

 In the warm weather 

 of midsummer the 

 larvae complete their 

 transformations 



1 This habit affords one of the most vulnerable points of attack. To 

 trap practically all the codling moths in an orchard it is only necessary to 

 scrape all loose bark off from the trees and fasten around the trunks a band 

 of burlap or heavy paper. Remove the bands and collect all larvae once a 

 week during July. 



Fig. jy. Work of a Single Borer on a 

 Young Peach Tree 



/, pupa ; g, gummy exudation. 

 (Photograph by Slingerland) 



