238 THE POME FRUITS 



length of about f of an inch. When the larva is full grown it 

 crawls out and seeks a place in which to spin its cocoon. 



The moth passes the winter in the larval stage in a small 

 silken cocoon, either under pieces of bark or in some other 

 convenient place which affords protection, in or near apple 

 trees. These larvse change to pupa and the moths emerge 

 in the spring. Soon after the emergence of the moth, egg 

 laying begins. 



Fig. 106. — Codling moth, natural size. (Slingerland.) 



In order to control the codling moth the life history must 

 be known. The growers, in the different sections, must 

 know the time the moths begin to lay their eggs so that 

 adequate and effective control methods can be. used. 

 After the worm is once inside of the apple it is proof against 

 any remedy. The poison must necessarily be applied to the 

 fruit before the larva enters it, if it is to be of any value. 



There are two and in some sections a partial third brood 

 of the codling moth, and remedial measures must be used 

 against every brood. 



Since the larva? eat the fruit, it is necessary to use some 

 stomach poison. The poison almost universally employed 

 against this insect is the arsenate of lead. Three sprays are 

 usually necessary. The first one should be given just as the 

 petals are falling, the second one about two weeks after the 



