78 



BULLETIN 932. U. S. PEPABTMEXT OE AGBICL~LTr~EE. 



Table LV. — Length of feeding period of codling moth larva of the third l>rood, 

 stock-jar method. Grand Junction. Colo.. 1916. 



Date of 



entering 



fruit. 



Num- 

 ber of 

 indi- 

 vid- 

 uals. 







Length of feeding period in 



specified day 







20 22 23 24 



2.5 



2t 



25 29 



30 



31 32 



33 





1 



1 



36 

 2 



: 7 

 1 



■:5 



39 



40 j 



Aue. 20 



21 



22 



23 



24 



2-5 



26 



27 



25 



29 



30 



31 



Sept. 1 



2 



3 



4 



5 



6 



7 



11 



Larvae.. 



27 3 1 . 



16 l___ i : 











3 1 

 1 .... 



.... 5 

 3 1 

 1 2 



1 l 



.... 



1 

 2 



7 

 .... 



.... 



1 





> Q 



l 



.... 



1 

 1 



2 3 

 16 



• 



11 



19 



16 



IS 



13 



29 



23 



27 



17 



9 



3 



14 



8 



3 



1 



... 1 ... 2 





1 

 2 









2 



..... 



1 

 3 



1 

 1 

 1 



1 







1 







2 

 2 

















1 



1 

 2 



.... 



"a" 



2 



l 



2 



2 

 1 



1 



I 



1 







: 







.. .. ] 



... 



... 



I 

 3 

 1 

 4 

 2 

 1 

 1 

 3 

 3 

 I 



3 





1 







1 1 



.... 



1 

 2 



1 







1 f 











' 



.... 



1 

 1 

 2 

 1 



i 

 : 



2 



1 







i 







.... 

 1 



1 



.... 



1 



: 













2 







: 

 l 



3 



1 

 1 

 1 



: 



l 



.... 



l 



3 

 5 

 3 



1 



3 



4 



4 



1 





' 

















1 

 2 













2 



1 



1 



..... 

 2 

















1 





























1 







2 



: 

















4 1 



























































331 3 3 3 4 



■5 



6 7 10 



17 14 15 16 



11 



li 



19 



25 



12 



16 



16 12 : 



entering 

 fruit. 



Num- 

 ber of 

 indi- 

 vid- 

 uals. 







Length, of feeding period in 



specified days. 





41 42 43 



- 



45 4€ 



47 45 



49 



: T : 



52 



53 54 



55 



55 59 63 ' 67 6S 



Aug. at 



21 



22 



23 



24 



25 



26 



27 



28 



29 



30 



31 



Seut. 1 



2 



3 



4 



5 



6 



7 



B 



11 



Larvte.. 



27 













i 



1 



.... 



1 







1 

















16 

 23 

 16 















l 





























2 



.... 



1 



2 



: 







1 

















1 



1 



1 





















3 : 



17 





























1 







: 

 l 



2 

 2 



























9. 1 







":■" 









l 





..... 











i 



.... 



19 

 16 







1 



.... 



1 

 1 



: 



.... 



i 



:::: 



1 













1 



















18 



1 



.... 









l 















1 



1 



13 

 29 

 23 









2 











1 









1 . 

 1 . 

 1 



i' 



"i 



2 







1 











1 









2 

 1 



1 

 2 

 1 

 1 



1 

 .... 

















27 

 17 

 9 

 3 

 14 



3 



1 



1 



.... 



1 



2 









2 



1 



: 



1 























2 

 1 









1 







1 



1 



l 





































1 









3 











1 1 

 1 .... 





l 



.... 



2 . 





















:::::::: ! 









1 









i 































i 





















321 11 4 



9 



14 1 



5 7 1 



1 ? 7 



4 



15 13 2 



Days. 



Average length of feeding period 37. 55 



Maximum 1 ength of feeding period 68 



Minimum length of feeding period 20 



CODLING MOTH BAND STUDIES OF 1916. 



The same orchards, the Edwards and Hamilton, that were used in 

 the band studies in 1915 were again made use of in 1916. As in 1915. 

 the larva? were collected every three days from beneath burlap bands 

 that encircled the trunks of certain trees and were kept under condi- 

 tions identical with those that obtained the previous season. 



