THE CODLING MOTH IN THE YAKIMA VALLEY, 



47 



MOTHS OF THE FIRST BROOD. 



Time of emergence. — Moths emerged in the insectary from July 13 

 to October 9, inclusive, a longer period than heretofore observed. 

 These moths include individuals emerging from material reared in 

 the insectary, and from larvae collected under bands in the field. 

 Three individuals emerging on September 5, 6, and 7 from insectary- 

 bred material are second-brood moths, and it is assumed that some 

 second-brood moths are included in the moths emerging from field 

 collections. Moths emerged in large numbers for about a month, 

 beginning July 21, with the maximum of 78 on July 31. Figure 28 

 graphically indicates these data. 



Oviposition by moths of the first brood. — The oviposition records of 

 46 cages in which were confined 645 female moths are given in 

 Table 40. Eggs were laid one day after emergence in 20 of the cages. 



Number of eggs per female moth. — Table 40 gives the data on the 

 deposition of 13,154 eggs by 645 females of the first brood, which 

 emerged between July 21 and August 30. This is an average of 

 20.39 eggs. 



Table 40. — Oviposition by codling moths of the first brood in rearing cages, Yakima, 



Wash., 1921. 







Sex. 



Date of— 



Number of days — 



Total 

 num- 

















From 

 emer- 





From 



Ob- 

 ser- 

 va- 



tion. 



Num- 

 ber 

 of 

 moths. 



Male. 



Fe- 

 male. 



Emer- 

 gence. 



First 

 oviposi- 

 tion. 



Maxi- 

 mum 

 oviposi- 

 tion. 



Last 

 oviposi- 

 tion. 



Be- 

 fore 

 ovi- 

 posi- 

 tion. 



gence 



to 

 maxi- 

 mum 

 ovi- 

 posi- 

 tion. 



Of 

 ovi- 

 posi- 

 tion. 



emer- 

 gence 

 to 

 last 

 ovi- 

 posi- 

 tion. 



ber 

 of 

 eggs 

 de- 

 pos- 

 ited. 



1 



20 



6 



14 



July 22 



July 23 



July 24 



Aug. 1 



1 



2 



10 



10 



211 



2 



14 



9 



5 



July 23 



July 25 



July 25 



Aug. 3 



2 



2 



10 



11 



274 



3 



21 



7 



14 



July 24 



...do 



July 27 



Aug. 6 



1 



3 



13 



13 



550 



4 



32 



9 



23 



July 25 



July 26 



July 29 



Aug. 15 



1 



4 



21 



21 



330 



5 



31 



12 



19 



July 26 



July 27 



July 30 



Aug. 8 



1 



4 



13 



13 



237 



6 



20 



7 



13 



July 27 



July 29 



July 29 



Aug. 7 



2 



2 



10 



11 



147 



7 



38 



16 



22 



July 28 



...do.... 



July 31 



Aug. 11 



1 



3 



14 



14 



646 



8 



35 



12 



23 



July 29 



July 30 



July 31 



Aug. 12 



1 



2 



14 



14 



390 



9 



40 



17 



23 



July 30 



July 31 



Aug. 1 



Aug. 8 



1 



2 



9 



9 



320 



10 



79 



29 



50 



July 31 



Aug. 1 



Aug. 2 



Aug. 13 



1 



2 



13 



13 



1,141 



11 



55 



19 



36 



Aug. 1 



Aug. 2 



Aug. 4 



Aug. 16 



1 



3 



15 



15 



992 



12 



54 



13 



41 



Aug. 2 



Aug. 3 



Aug. 7 



Aug. 15 



1 



5 



13 



13 



757 



13 



74 



26 



48 



Aug. 3 



Aug. 4 



Aug. 6 



Aug. 14 



1 



3 



11 



11 



764 



14 



20 



5 



15 



Aug. 4 



Aug. 6 



Aug. 7 



Aug. 11 



2 



3 



6 



7 



356 



15 



70 



22 



48 



Aug. 5 



...do.... 



...do.... 



Aug. 20 



1 



2 



15 



15 



1,666 



16 



63 



23 



40 



Aug. 6 



Aug. 8 



Aug. 8 



Aug. 23 



2 



2 



16 



17 



715 



17 



35 



13 



22 



Aug. 7 



...do.... 



Aug. 10 



Aug. 19 



1 



3 



12 



12 



421 



18 



40 



11 



29 



Aug. 8 



Aug. 9 



Aug. 13 



Aug. 26 



1 



5 



18 



18 



307 



19 



36 



12 



24 



Aug. 9 



Aug. 12 



Aug. 14 



...do.... 



3 



5 



15 



17 



507 



20 



18 



9 



9 



Aug. 10 



...do.... 



Aug. 19 



Aug. 2.3 



2 



9 



12 



13 



59 



21 



26 



9 



17 



Aug. 11 



...do.... 



Aug. 15 



Aug. 27 



1 



4 



16 



16 



269 



22 



18 



5 



13 



Aug. 12 



Aug. 14 



Aug. 14 



Aug. 23 



2 



2 



10 



11 



186 



23 



30 



9 



21 



Aug. 13 



...do.... 



Aug. 15 



Sept. 1 



1 



2 



19 



19 



234 



24 



9 



4 



5 



Aug. 14 



Aug. 15 



...do.... 



Sept. 2 



1 



1 



19 



19 



114 



25 



24 



10 



14 



Aug. 15 



Aug. 18 



Aug. 23 



3 



8 



16 



18 



232 



26 



15 



5 



10 



Aug. 16 



...do.... 



Aug. 22 



Aug. 30 



2 



6 



13 



14 



135 



27 



5 



2 



3 



Aug. 17 



Aug. 20 



...do.... 



Aug. 27 



3 



5 



8 



10 



65 



28 



13 



5 



8 



Aug. 18 



Aug. 19 



Aug. 20 



Aug. 31 



1 



2 



13 



13 



95 



29 



16 



9 



7 



Aug. 19 



Aug. 20 



Aug. 25 



Sept. 7 



1 



6 



19 



19 



414 



30 



15 



4 



11 



Aug. 20 



Aug. 23 



Aug. 24 



Sept. 5 



3 



4 



14 



16 



99 



31 



15 



9 



6 



Aug. 21 



Aug. 25 



Aug. 30 



Sept. 9 



4 



9 



16 



19 



296 



32 



5 



4 



1 



Aug. 22 



Aug. 29 



Aug. 29 



Aug. 29 



7 



7 



1 



7 



2 



33 



8 



5 



3 



Aug. 28 



...do.... 



Aug. 30 



Sept. 26 



1 



2 



29 



29 



104 



34 



10 



Averag 

 Maxim 

 Minimi 



2 

 e 



8 



Aug. 29 



Aug. 31 



Sept. 3 



Sept. 7 



2 



5 



8 



9 



119 





1.74 



7 

 1 



3.79 

 9 

 2 



13.56 

 29 



1 



14.29 



29 



7 





um.. . 







lm. .. 













Number of male moths 359 



Number of female moths 645 



Total number of moths 1 , 004 



Total number of eggs 13, 154 



Average number of eggs per female moth 20. 39 



