22 



BULLETIN 252, U. S. DEPARTMENT OF AGRICULTURE. 



Table XVI. — Life cycle of the first generation of the codling moth, as observed by rearing 

 at TTinthrop, Me., 1913, stock-jar feeding method. 



Date of- 



Davs for— 



Xo. of 

 obser- 

 va- 

 tion. 



Egg dep- 



Hatching. 



Larva leay-l Pupa- ^mer- 

 mg the fruit, tion. ! f^ h _ 



! 



Hatch- 

 ing. 



Fesd - rn^of Pu P al 

 tog. &° f period. 



Life 

 cycle. 



June 30 July 

 July 1 ! July 



...do.... 



...do.... 



...do.... 



...do.... 



...do 



July 3 



...do 



July 7 

 July 11 



Average . . . 

 Maximum. 

 Minimum . 



...do 

 ...do. 

 ...do. 

 ...do. 

 ...do. 

 July 

 ...do. 

 Julv 

 Julv 



July 30 c? • 

 Julv 25 ... 

 Julv 26. . . . 

 Julv 27.... 

 Julv 28 3 . 

 July 29 c? - 

 Julv 31 9 . 

 Julv 30 9 . 

 Julv 31 . 

 Aug. 3 9 . 

 Aug. 5 9 



Aug. 7 

 Julv 30 



!...do... 

 Aug. 1 

 Aug. 3 



...do.... 

 Aug. 6 

 Aug. 5 

 Aug. 9 

 Aug. 15 

 Aug. 11 



Aug. 22 

 Aug. 11 

 Aug. 14 

 Aug 16 

 Aug. 17 

 ...do.... 

 Aug. 19 

 Aug. 20 

 Aug. 23 

 Aug. 30 

 Aug. 26 



20. 454 

 24 

 17 



O4o 



12 



4 



15 

 12 

 15 

 15 

 14 

 14 

 13 

 15 

 14 

 15 

 15 



14. 272 

 15 

 12 



53 



41 

 44 

 46 

 47 

 47 

 49 

 48 

 51 

 54 

 46 



47. 818 

 54 

 41 



1 Add 4 days for complete life cycle. 



Table XVII. — Life cycle of the first generation of the codling moth, as observed by rearing 

 at Winthrop, Me., 1913, watered I stock- jar feeding method I 



Xo. of 



Date of— 





Days for 























obser- 























va- 

 tion. 



Egg dep- 

 osition. 



Hatching. 



Larva 

 leaving 

 the fruit. 



Pupa- 

 tion. 



Emer- 

 gence 

 of moth. 



Hatch- 

 ing. 



Feed- 

 ing. 



Mak- 

 ing of 

 cocoon. 



Pupal 

 period. 



Life 



cycle. 1 



1 



July 1 



Julv 7 



Julv 29 2 



Aug. 3 Aug. 17 



6 



22 



5 



14 



47 



2 



...do.... 



...do.... 



Julv 30 2 



...do ...do 



6 



23 



4 



14 



47 



3 



July 2 



Julv 8 



Aug. 3 3 



Aug. 9 



Aug. 23 



6 



26 



6 



14 



52 



4 



...do.... 



...do.... 



Aug. 8 



Aug. 10 



Aug. 26 



6 



31 



2 



16 



00 



5 



July 3 



Julv 10 



Aug. 6 2 



Aug. 13 



Aug. 31 



2 



27 



i 



18 



59 



6 



July 4 



July 11 



Aug. 3 3 



Aug. 16 



Sept. 1 



7 



23 



13 



16 



59 



* 



July 5 



July 12 



Aug. 2 2 



Aug. 9 



Aug. 24 



7 



21 



7 



15 



50 ! 



8 



...do.... 



...do.... 



Aug. 3 2 



Aug. 10 



Aug. 25 



i 



22 



7 



15 



51 



9 



...do.... 



...do.... 



Aug. 7 3 



Aug. 14 



Aug. 29 



7 



26 



/ 



15 



00 



10 



July 8 



July 16 



Aug. 10* 



Aug. 22 



Sept. 6 



8 



25 



12 



15 



60 







6.7 



24.6 



- 



15.2 







8 

 6 



31 



21 



13 

 2 



IS 



14 



60 1 

















1 Add 4 days for complete life cycle. 



Male. 



Female. 



