LIFE HISTORY OF THE CODLING MOTH IN MAINE. 



27 



Table XXI. — Length of feeding -period of second-brood larvse, stock-jar method, Winthrop, 



Me., 1913— Continued. 



Number 

 of indi- 

 viduals. 



Date of 



entering 



fruit. 



Length of feeding period in specified days. 



64 



65 



66 



69 



70 



71 



72 



75 



77 



S 



9 



a 



9 



<? 



9 



e. 



9 



(?• 



9 



6* 



9 



3 



9 



,9 



<? 



9 



3 

 3 

 9 



7 

 8 



10 

 3 

 1 



20 



13 

 2 



11 

 2 

 5 

 5 

 2 

 2 



Aug. 23 

 Aug. 24 

 Aug. 25 

 Aug. 26 

 Aug. 27 

 Aug. 28 

 Aug. 29 

 Aug. 30 

 Sept. 1 

 Sept. 2 

 Sent 3 































1 r 

































! 



1 





























































1 















i 





































........ 











1 































""]' " 































:::::::: 

































































.. .- 





........ 



........ 











































Sept. 4 

 Sept. 5 

 Sept. 6 

 Sept. 8 

 Sept. 9 

 Sept. 11 





l 









l 



















(2) 







i 



l 



















" l " | 



1 



l 





















1 



! •■■ 



















1 



3 





























l 





































i 



i 







| 











2 



i 



1 







l 

















1 



1 1 



1 







106 



3 and 9.1 1 



l 



1 



3 











j 







2 





I 









Tot 



al 



3 



1 



2 



1 



1 



4 



1 



1 



1 



3 



Average length of feeding period, 106 male and female larvae, 49.160 days; 47 male larvae, 46.659 days; 

 57 female larva?, 50.245 days. 



Maximum length of feeding period, 106 male and female larvae, 77 days; 47 male larvae, 77 days; 57 

 female larvee, 72 days. 



Minimum length of feeding period, 106 male and female larvae, 31 days; 47 male larvae, 31 days; 57 

 female larvae, 33 days. 



BAND RECORD EXPERIMENT, 1913-14. 



As previously stated, the collecting of codling-moth larvae from 

 banded trees serves as a basis for comparison of the larvae living 

 under natural conditions with those reared under laboratory condi- 

 tions. As shown in Table XXII, the first larvae left the fruit of the 

 banded trees July 21, while the last were collected October 13. The 

 first of the larvae reared at the insectary left the fruit July 25. 



Out of a total of 1,012 larvae collected from the bands, but 8 larvae 

 (less than 1 per cent) transformed during 1913. One parasite 

 (Ascogaster carpocapsse Vier.) emerged in 1913. 



Owing to the exceptionally severe winter of 1913-14 the mortality 

 of the wintering larvae was very high. It was computed that 81.52 

 per cent of the larvae were killed, due to the low temperatures. 



In the spring of 1914, 82 moths and 96 parasites emerged. The 

 parasites were all of the species Ascogaster carpocapsse Vier. 



The well known codling-moth enemy Tenebroides corticalis Meish. 

 was frequently found attacking the larvae beneath the bands. 



