THE CODLING MOTH IN THE YAKIMA VALLEY, 



17 



Length of incubation. — Data on this phase of the life history are 

 set forth in Table 14. The average incubation period of 8.72 days 

 is not much more than half that of the first brood of eggs. 



Table 14. — Time of deposition and length of incubation of eggs of the second brood 

 of the codling moth, Yakima, Wash., 1919. 







Number of days from deposition to appearance of — 









Date of 

 deposition. 



Num- 

 ber of 

 eggs. 













Incubation period in 

 days. 



Red ring. 



Black spot. 





Aver- 



Maxi- 



Mini- 



Aver- 



Maxi- 



Mini- 



Aver- 



Maxi- 



Mini- 







age. 



mum. 



mum. 



age. 



mum. 



mum. 



age. 



mum. 



mum. 



July 15 



3 



3.00 



3 



3 



6.00 



6 



6 



7.00 



7 



7 



17 



4 



2.00 



2 



2 



5.00 



5 



5 



7.00 



7 



7 



18 



27 



2.00 



2 



2 



6.00 



6 



6 



7.22 



8 



7 



19 



8 



3.00 



3 



3 



5.00 



5 



5 



6.63 



7 



6 



20 



52 



2.00 



2 



2 



5.48 



6 



5 



7.48 



8 



7 



21 



118 



2.00 



2 



2 



6.00 



6 



6 



7.25 



8 



7 



22 



162 



2.00 



2 



2 



6.00 



6 



6 



7.10 



8 





23 



99 



2.00 



2 



2 



6.00 



6 



6 



7.04 



8 





24 



44 



2.00 



2 



2 



6.00 



6 



6 



7.55 



9 





26 



90 



2.00 



2 



2 



6.00 



6 



6 



7.62 



8 





27 



106 



2.00 



2 



2 



6.00 



6 



6 



7.66 



8 



7 



28 



76 



2.00 



2 



2 



6.28 



7 



6 



8.28 



9 



8 



29 



359 



2.00 



2 



2 



7.27 



8 



7 



8.53 



10 



8 



30 



213 



2.00 



2 



2 



7.00 



7 



7 



8.13 



9 



8 



31 



261 



2.00 



2 



2 



7.00 



7 



7 



8.17 



9 



8 



Aug. 1 



231 



3.00 



3 



3 



7.00 



7 



7 



8.26 



9 



8 



2 



135 



2.00 



2 



2 



7.00 



7 



7 



8.01 



9 



8 



3 



77 



2.00 



2 



2 



7.00 



7 



7 



8.34 



9 



8 



4 



102 



2.00 



2 



2 



6.00 



6 



6 



7.16 



8 



7 



5 



201 



2.00 



2 



2 



6.00 



6 



6 



7.19 



8 



7 



6 



151 



2.00 



2 



2 



6.00 



6 



6 



7.00 



7 



7 



7 



130 



2.00 



2 



2 



6.00 



6 



6 



7.60 



9 



7 



8 



59 



2.00 



2 



2 



6.00 



6 



6 



7.90 



8 



7 



9 



120 



2.00 



2 



2 



6.00 



6 



6 



7.04 



8 



7 



10 



115 



2.00 



2 



2 



6.00 



6 



6 



7.22 



8 



7 



12 



64 



2.00 



2 



2 



6.00 



6 



6 



7.00 



7 



7 



13 



91 



2.00 



2 



2 



6.00 



6 



6 



7.08 



8 



7 



14 



108 



2.00 



2 



2 



6.00 



6 



6 



7.03 



8 





15 



56 



2.00 



2 



2 



6.00 



6 



6 



7.07 



8 





1G 



104 



2.00 



2 



2 



6.00 



6 



6 



7.02 



8 





17 



59 



2.00 



2 



2 



6.00 



6 



6 



7.10 



8 



7 



18 



31 



2.00 



2 



2 



6.00 



6 



6 



7.16 



8 



7 



19 



28 



2.00 



2 



2 



6.00 



6 



6 



7.07 



8 



7 



20 



58 



2.00 



2 



2 



6.00 



6 



6 



7.12 



8 



7 



21 



158 



2.00 



2 



2 



6.00 



6 



6 



7.72 



8 



7 



22 



52 



2.00 



2 



2 



6.94 



7 



6 



8.06 



9 



7 



23 



100 



2.00 



2 



2 



7.00 



7 



7 



8.05 



9 



8 



24 



94 



2.00 



2 



2 



7.00 



7 



7 



9.27 



10 



9 



25 



101 



2.00 



2 



2 



8.00 



8 



8 



10.19 



12 



10 



26 



36 



2.00 



2 



2 



9.00 



9 



9 



12.50 



14 



12 



27 



22 



2.86 



3 



2 



10.86 



11 



10 



12.05 



13 



11 



29 



158 



2.00 



2 



2 



10.85 



13 



10 



12.61 



15 



11 



30 



109 



2.00 



2 



2 



13.00 



13 



13 



15.49 



17 



14 



31 



14 



1.00 



1 



1 



14.00 



14 



14 



15.71 



17 



15 



Sept. 1 



29 



2.00 



2 



2 



14.00 



14 



14 



15.66 



17 



15 



2 



103 



2.00 



2 



2 



14.00 



14 



14 



16.29 



17 



15 



3 



54 



4.00 



4 



4 



13.00 



13 



13 



14.00 



14 



14 



4 



18 



5.00 



5 



5 



12.00 



12 



12 



13.33 



14 



13 



7 



109 



5.00 



5 



5 



9.00 



9 



9 



10.41 



11 



10 



9 



117 



4.00 



4 



4 



9.00 



9 



9 



10.71 



12 



10 



10 



86 



4.00 



4 



4 



9.00 



9 



9 



11. 20 



12 



11 



13 



105 



3.00 



3 



3 



8.00 



8 



8 



10.92 



12 



9 



14 



52 



3.00 



3 



3 



9.00 



9 



9 



11.06 



12 



10 



15 



20 



4.00 



4 



4 



9.00 



9 



9 



11.10 



12 



10 



5,079 



2.26 



5 



1 



7.29 



14 



5 I 



8.72 



17 



6 



74366°— 24- 



