THE CODLING MOTH IN THE YAKIMA VALLEY. 



33 



THE SECOND GENERATION. 



EGGS OF THE SECOND BROOD. 



Time of deposition. — The earliest second-brood eggs were deposited 

 July 27, and eggs were deposited almost continuously thereafter until 

 October 10, with a maximum period of oviposition extending prac- 

 tically throughout the month of August, as shown in Figure 18. 

 The actual maximum of 833 eggs occurred on August 7, only 11 days 

 after the first egg was deposited. 



Length of incubation. — The incubation period for 4,135 eggs was 

 determined and the data on the various changes in the eggs are 

 shown in Table 30. It will be seen that the average length of incu- 

 bation was 8.74 days, closely approximating that of 1919. 



Table 30. — Time of de-position and length of incubation of eggs of the second brood 

 of the codling moth, Yakima, Wash., 1920. 







Number of days from deposition to 



appearance of — 











Num- 

 ber of 













Incubation period 



in days. 













Date of 

 deposition. 



Red ring 





Black spot 











eggs. 























Aver- 



Maxi- 



Mini- 



Aver- 



Maxi- 



Mini- 



Aver- 



Maxi- 



Mini- 







age. 



mum. 



mum. 



age. 



mum. 



mum. 



age. 



mum. 



muni . 



July 27 



4 



3.00 



3 



3 



5.00 



5 



5 



6.00 



6 



6 



28 



9 



4.00 



4 



4 



5.00 



5 



5 



6.00 



6 



6 



29 



21 



3.00 



3 



3 



5.00 



5 



5 



6.14 



7 



6 



30 



101 



2.00 



2 



2 



5.00 



5 



5 



6.43 



7 



6 



31 



34 



3.00 



3 



3 



5.00 



5 



5 



6.09 



7 



6 



! Aug. 1 



119 



3.00 



3 



3 



5.00 



5 



5 



6.45 



8 



6 



2 



148 



2.00 



2 



2 



5.00 



5 



5 



6.02 



7 



6 



3 



115 



2.00 



2 



2 



5.00 



5 



5 



6.00 



6 



6 



4 



150 



3.00 



3 



3 



5.00 



5 



5 



6.00 



6 



6 



5 



139 



3.00 



3 



3 



5.00 



5 



5 



6.06 



7 



6 



6 



230 



2.00 



2 



2 



5.00 



5 



5 



6.00 



6 



6 



7 



268 



3.00 



3 



3 



5.00 



5 



5 



6.08 



7 



6 



8 



237 



3.00 



3 



3 



5.00 



5 



5 



6.06 



7 



6 



9 



282 



3.00 



3 



3 



5.00 



5 



5 



6.02 



7 



6 



10 



159 



2.00 



2 



2 



5.00 



5 



5 



6.00 



6 



6 



11 



82 



3.00 



3 



3 



4.00 



4 



4 



6.85 



7 



5 



12 



60 



3.00 



3 



3 



4.00 



4 



4 



6.67 



8 



6 



13 



132 



4.00 



4 



4 



6.00 



6 



6 



7.95 



8 



7 



14 



111 



3.00 



3 



3 



6.00 



6 



6 



8.14 



9 



7 



15 



274 



3.00 



3 



3 



7.00 



7 



7 



8.00 



8 



8 



16 



56 



4.93 



6 



4 



7.00 



7 



- 7 



8.46 



9 



8 



17 



1 



4.00 



4 



4 



6.00 



6 



6 



7.00 



7 



7 



18 



22 



4.00 



4 



4 



6.00 



6 



6 



8.50 



9 



8 



19 



44 



3.02 



4 



3 



6.93 



8 



6 



8.93 



10 



8 



20 



82 



4.00 



4 



4 



/.78 



8 



7 



10.78 



11 



10 



21 



21 



3.19 



4 



3 



8.10 



9 



7 



11.05 



12 



9 



22 



28 



3.07 



4 



3 



8.71 



10 



8 



11.71 



13 



11 



23 



237 



3.00 



3 



3 



10.00 



10 



10 



12.03 



13 



12 



: 24 



110 



4.00 



4 



4 



11.00 



11 



11 



12.00 



12 



12 



26 



126 



1.00 



4 



4 



9.00 



9 



9 



10.75 



11 



10 



28 



134 



5.00 



5 



5 



8.03 



9 



8 



10.31 



12 



10 



29 



6 



3.00 



3 



3 



8.00 



8 



8 



9.17 



10 



9 



30 



70 



3.00 



3 



3 



8.03 



9 



8 



9.34 



11 



9 



31 



14 



3.07 



4 



3 



7.79 



9 



7 



9.79 



11 



9 



Sept. 1 



19 



3.00 



3 



3 



8.05 



9 



8 



10.79 



12 



10 



2 



16 



4.81 



5 



4 



8.81 



9 



8 



11.75 



12 



10 



i 3 



32 



3.00 



3 



3 



11.00 



11 



11 



14.06 



15 



14 



4 



100 



3.12 



4 



3 



13.12 



14 



13 



14.84 



16 



14 



5 



19 



4.00 



4 



4 



13.00 



13 



13 



14.92 



15 



14 



6 



17 



4.00 



4 



4 



13.00 



13 



13 



15.82 



17 



15 



7 



80 



4.53 



5 



4 



14.53 



15 



14 



18.78 



20 



17 



8 



19 



4.21 



5 



4 



14.21 



15 



14 



18.00 



19 



17 



10 



31 



5.00 



5 



5 



15.29 



16 



15 



19.23 



20 



IS 



11 



23 



4.09 



5 



4 



16.43 



17 



16 



18.52 



20 



18 



12 



5 



4.60 



5 



4 



16.00 



16 



16 



19.00 



20 



18 



13 



1 



4.00 



4 



4 



16.00 



16 



16 



18.00 



18 



18 



14 



20 



4.15 



5 



4 



15.85 



16 



15 



18.00 



19 



17 



15 



27 



4.96 



5 



4 



15.19 



16 



14 



19.19 



20 



18 



16 



43 



5.05 



6 



5 



15.26 



16 



15 



18.30 



20 



18 



17 



40 



6.30 



7 



5 



15.65 



16 



15 



18. 8S 



20 



18 



19 



6 



4.83 



5 



4 



15.50 



16 



15 



17.50 



19 



16 



20 



2 



7.00 



7 



7 



16.00 



16 



16 



21.00 



21 



21 



21 



9 



8.22 



9 



8 



17.22 



18 



17 



21.00 



22 



20 



4,135 



3.19 



9 



2 



7.14 



18 



4 



8.74 



22 



5 



74366°— 24- 



