50 BULLETIN 252, U. S. DEPARTMENT OF AGRICULTURE. 



The earliest first-brood eggs were deposited approximately three 

 weeks after the petals dropped. 



The incubation period of the first-brood eggs averaged eight days. 



The first-brood eggs began to hatch in from four to five weeks after 

 the petals had fallen. 



The transforming larvae of the first brood fed for a period of about 



22 days. 



The overwintering larvae of the first brood had an average feeding 



period of 28 days. 



The female larvae of the first brood fed for a longer period than the 

 male. 



The average time spent by the transforming larvae in constructing 

 their cocoons was about six days. 



Approximately from 1 to 2 per cent of the first-brood larvae trans- 

 formed to first-brood pupa?. The remainder of the larvae did not 

 transform until the following spring (spring pupae). 



Pupation of the first or summer brood commenced during the latter 

 part of July. The average length of the first-brood pupal stage was 

 15 days. 



The first or summer brood of moths began to emerge just previous 

 to mid- August and continued to issue for a period of about one month. 



Oviposition by moths of the first brood began about mid- August. 



The life cycle of the first generation was 51 days. The complete 

 life cycle was about 55 days. 



The average incubation period of the second brood of eggs was 11 

 days. 



The average feeding period of the second-brood larvae was 46 days. 



The female larvae of the second brood fed for a longer time than the 

 male. 



The hymenopterous parasite Ascogaster carvocapsse Vier. was fre- 

 quently reared. 



The well-known beetle enemy Tenebroides corticalis Melsh. was com- 

 monly found attacking codling-moth larvae. 



The codling moth in Maine may be controlled with one spray 

 thoroughly applied as soon as the petals drop. Arsenate of lead, 

 paste 2 pounds or powder 1 pound to each 50 gallons of water, 

 is recommended. 



o 



