THE CODLING MOTH IN THE OZARKS. 



11 



when a large number of moths were caged on the same date, eggs were 

 obtained on the third day. A record of first-brood moths confined in 

 a cage is given in Table IX. 



Table IX. — Life of first-brood moths (Cage III), reared from first-brood larvae from 

 earliest ivormy apples collected in orchard, and from earliest larvse reared in bagged 

 fruit. 



Eggs laid (at night). 



Moths emerged and put 

 into cage. 



Date. 



Number. 





1 

 1 



1 

 5 

 2 

 11 





June 11 





June 14 









Total... 



21 







Moths died 





Average 

 life of 

 moths. 



Date. 



Number. 



June 16 



1 



1 

 7 

 7 

 5 



M>.2 days. 



June 18 







Escaped 





Total 



16 



Date. 



June 13 



June 14 



June 15 



June 16 



June 17 



June 18 



Total 



Number. 



26 



18 



104 



25 



In 1907 no first-brood moths were obtained until June 25. In 1906 

 Mr. Moulton records the issuing of a moth on June 19 from apples 

 sent from Bentonville, Ark. 



LENGTH OF LIFE CYCLE OF FIRST GENERATION. 



The interval between the emergence of the first adult of the win- 

 tering brood and the earliest first-brood moth was 69 days. Starting 

 with a spring moth emerging after the weather became warm, the 

 life cycle would be much shorter. A moth emerging May 5 might 

 lay eggs May 10. Eggs laid on the latter date required 7 \ days to 

 hatch. This, together with 24 days in the fruit and 18 days in the 

 cocoon, gives a total of about 54 days as an average time for the latter 

 half of the first generation. 



THE SECOND GENERATION. 



SECOND-BROOD EGGS. 



The earliest of the first brood of moths began depositing eggs on 

 the night of June 13. In 1907 second-brood eggs were not laid in cages 

 until July 5. All eggs of this brood required a nearly uniform period 

 of 5 days for incubation. In Table X is given a record of the incuba- 

 tion of some of the earlier eggs of this brood. 



Table X. — Second-brood eggs — incubation periods of eggs laid in Cage III (recorded in 



Table IX). 



Number 

 of eggs. 



Eggs laid 



(at 

 night). 



Red ring 



ap- 

 peared. 



Black 

 spot ap- 

 peared. 



When 

 hatched. 



Length 

 of egg 

 stage. 



26 

 18 

 104 

 25 



June 15 

 June 16 

 June 17 

 June 18 



June 18 

 June 19 

 ...do.... 

 June 20 



June 20 

 June 21 

 June 22 



June 21 



..ado 



oJune 22 



June 23 



Days. 



Bk 



5 

 5 

 5| 





At night. 



