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 deposition 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— 











V 











Incubation period 



in days. 











Date of 



ber of 





Red ring. 





Black spot 











deposition. 



eggs. 







































Aver- 



Maxi- 



Mini- 



A ver- 



Maxi- 



Mini- 



Aver- 



Maxi- 



Mini- 







age. 



mum. 



mimi. 



age. 



mum. 



mum. 



age. 



mum. 



mum. 



July 27 



4 



3.00 



3 



3 



5.00 



5 



5 



6.00 



6 



6 



2S 



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 



14S 



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 



11 



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 



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 



1.21 



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 



1^ 



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 



is. 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 



is. 30 



20 



18 



17 



40 



6.30 



7 



5 



15.65 



16 



15 



18, 88 



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- 



