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 Winthrop, Me., 1913, stock-jar feeding method. 



No. of 

 obser- 



Date of— 



Days for- 



Egg dep- 

 osition. 



June 30 

 July 1 

 ..do.... 



...do 



..do 



..do 



..do 



July 3 



..do 



July 7 

 July 11 



Hatching. 



July 

 July 

 ..do 

 ..do. 

 ..do. 

 ..do. 

 ..do. 

 July 

 ..do. 

 July 

 July 



Larva leav- 

 ing the fruit. 



July 30 3 . 

 July 2b ... 



July 26 



Julv27 



July 28 S ■ 

 July 29 cf - 

 July 31 9 . 

 July 30 9 - 

 July 31 9 . 

 Aug. 3 9 - 

 Aug. 5 9 



Pupa- 

 tion. 



Aug. 7 

 July 30 

 ...do .... 

 Aug. 1 

 Aug. 3 

 ...do.... 

 Aug. 6 

 Aug. 5 

 Aug. 9 

 Aug. 15 

 Aug. 11 



Emer- 

 gence 

 of moth. 



Aug. 22 

 Aug. 11 

 Aug. 14 

 Aug 16 

 Aug. 17 

 ..do.... 

 Aug. 19 

 Aug. 20 

 Aug. 23 

 Aug. 30 

 Aug. 26 



Average . . . 

 Maximum. 

 Minimum . 



Hatch- 

 ing. 



6. 545 



8 

 6 



Feed- 

 ing. 



20. 454 

 24 



17 



Mat- p , 

 in S° f perfod 



.545 

 12 

 4 



14. 272 

 15 

 12 



Life 

 cycle. 1 



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 stock- jar feeding method. 



No. of 

 obser- 



Date of— 





' Days for 



























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 



July 7 



July 29 2 



Aug. 3 



Aug. 17 



6 



22 



5 



14 



47 



2 



...do 



...do 



July 30 2 



...do 



...do 



6 



23 



4 



14 



47 



3 



July 2 



July 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 



' 55 



5 



July 3 



July 10 



Aug. 6 2 



Aug. 13 



Aug. 31 



7 



27 



7 



18 



59 



6 



July 4 



July 11 



Aug. 3 3 



Aug. 16 



Sept. 1 



7 



23 



13 



16 



59 



7 



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 



7 



22 



7 



15 



51 



9 



...do.... 



...do.... 



Aug. 7 3 



Aug. 14 



Aug. 29 



7 



26 



7 



15 



55 



10 



July 8 



July 16 



Aug. 10' 



Aug. 22 



Sept. 6 



8 



25 



12 



15 



60 



Average 





6.7 



24.6 



7 



15.2 



53.5 





8 

 6 



31 

 21 



13 

 2 



18 

 14 



60 



47 













1 Add 4 days for complete life cycle. 



2 Male. 



s Female. 



