24 



BULLETIX 189, U. S. DEPARTMENT OF AGRICULTURE. 



Table XVII. — Number of larvae of the codling moth taken from the bands and reared at 

 Winchester, la., during the summer of 1912 and the spring of 1918. (See fig. 13.) 





Number 

 of larvae 

 collected. 



Number 

 of dead 

 from 

 handling, 

 cannibal- 

 ism, etc. 



Emerged, 1912. 



Number 

 of larvae 

 overwin- 

 tering. 



Number 

 of larvae 

 winter- 

 killed. 



Emerged, 1913. 



Date of collection, 

 1912. 



Moths. 



Parasites. 



Moths. 



Parasites. 





3 



20 



23 



56 



71 



70 



56 



37 



33 



14 

 8 

 8 

 7' 

 9 



19 



37 



56 



59 



32 



22 



44 



34 



32 



18 



11 

 5 

 1 

 2 

 5 

 2 

 3 





1 

 3 



14 



23 



36 



42 



37 



31 



19 



11 



6 



4 



1 









"* 





23 



::;: 











27 



: 











1 



1 







Julv 1 











16 

 24 

 31 

 16 

 11 

 17 

 2 

 1 



3 



4 

 1 

 3 



1 



1 



1 



6 



7 



5 



6 



3 



7 



6 



8 



14 



30 



52 



56 



18 



16 



27 



31 



26 



8 



5 



3 



1 



1 



1 



1 



1 







9 



1 

 1 

 4 

 6 

 4 

 6 

 3 

 7 

 4 

 8 

 10 

 21 

 33 

 27 

 10 

 9 



12 

 17 

 16 

 8 

 5 

 3 

 1 

 1 

 1 

 1 





13... 







17 



2 



1 

 1 





21 





25 







29 



























1 

 1 

 5 

 7 

 4 

 3 



14 

 6 



17 

 3 

 6 



10 

 6 

 2 





2 





13 









17 







4 

 8 

 19 

 29 

 6 

 7 

 15 

 14 

 10 





21.. 







1 



24... 









29 . 









Sept. 2... 







2 



6 









10 









14... 









IS 









21... 









25... 











2S . 











Oct. 2. . . 











5 



1 

 4 

 1 

 3 











10... 













15... 











18 



















Total 



798 

 100 



217 

 27.19 



228 

 28.57 



11 



1.38 



342 



42.86 



120 

 15.04 



219 

 27.44 



3 





"0.38 







SUMMARY FOR SEASON OF 1912. 



Spring-brood moths began emerging in the laboratory May 18 to 

 22, and probably two or three days earlier in the field. First-brood 

 larvae began entering the fruit hi the field May 24. First-brood larvae 

 began leaving the apples June 19. First-brood moths began emerg- 

 ing July 9; second-brood larvae were observed entering fruit in the 

 field on July 15, and a few had finished feeding by August 9 to 13. 



INVESTIGATIONS IN 1913. 



SPRIXG-BROOD AND FIRST-BROOD MOTHS. 



The seasonal conditions of -the spring of 1913 were considerably 

 in advance of those of 1912, and the appearance of the spring-brood 

 moths was correspondingly earlier. Moths appeared in numbers on 

 May 6 and maximum emergence occurred three days later. 



