24 



BULLETIX 189^ U. S. DEPAKTMEXT OF AGEICULTURE, 



Table XVII. — Number of larva; of the codling moth taken from the hands and reared at 

 ■ Winchester, Va., during the summer of 1912 and the spring of 1913. (See fig. 13.) 





Number 

 of larvae 

 collected. 



Number 

 of dead 

 from 

 handling, 

 cannibal- 

 Ism, etc. 



Emerge 



Moths. 



A, 1912. 

 Parasites. 



Number 

 of larvse 

 overwin- 

 tering. 



Number 

 of larvae 

 winter- 

 killed. 



Emerged, 1913. 



Dateofcolloction, 

 1912. 



Moths. 



Parasites. 



June 19 



1 



3 



20 



23 



56 



71 



70 



56 



37 



33 



14 



8 



8 



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 





i 









27 



5 





1 



1 







July 1 





1 





16 

 24 

 31 

 16 

 11 

 17 

 2 

 1 



3 



4 

 1 

 3 



\ 



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 



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 























9 



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 



6 







2 









10 









14 









18 









21 









25 











28 











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 



Percent 



0.38 



SUMMARY FOR SEASON OP 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 

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

 began leaving the apples Jmie 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. 



SPRING-BROOD AND FIRST-BROOD MOTHS. 



The seasonal conditions of the sprmg 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 tliree days later. 



