24 



BULLETIN 1235, U. S. DEPARTMENT OP AGRICULTURE. 



Table 19. — Oviposition by codling moths of the spring brood in rearing cages, 



Yakima, Wash., 1920. 







Sex. 



Date of— 



Number of days — 



Total 























Ob- 



Num- 

















From 



emer- 





From 



num- 

 ber 



ser- 

 va- 

 tion. 



ber of 

 moths 



Male. 



Fe- 

 male. 



Emer- 

 gence. 



First 

 oviposi- 

 tion. 



Maxi- 

 mum 

 oviposi- 

 tion. 



Last 

 oviposi- 

 tion. 



Before 

 ovi- 

 posi- 

 tion. 



gence 



to 

 maxi- 

 mum 

 ovi- 

 posi- 

 tion. 



Of 

 ovi- 

 posi- 

 tion. 



gence 

 to 

 last 

 ovi- 

 posi- 

 tion. 



of 

 eggs 



pos- 

 ited. 



1 



6 



1 



5 



May 15 



May 19 



May 24 



June 8 



4 



9 



21 



24 



9 



2 



12 



9 



3 



May 16 



May 26 



June 19 



June 19 



10 



34 



25 



34 



23 



3 



4 



9 

 11 



8 

 7 



1 



4 



May 17 

 May 18 



















 13 



May 26 



June 3 



June 4 



8 



16 



10 



17 



5 



8 



7 



1 



May 19 



June 11 



June 11 



June 11 



23 



23 



1 



23 



5 



8 



21 



13 



8 



May 20 



May 31 



May 31 



June 8 



11 



11 



9 



19 



32 



7 

 8 



6 

 25 



5 



12 



1 

 13 



May 21 

 May 22 



















 33 



May 26 



June 3 



June 13 



4 



12 



19 



22 



9 



14 



11 



3 



May 23 



May 31 



...do 



June 3 



8 



11 



4 



11 



4 



10 



12 



11 



1 



May 24 



June 3 



June 9 



June 12 



10 



16 



10 



19 



6 



11 



32 



19 



13 



May 25 



May 31 



...do 



June 21 



6 



15 



22 



27 



177 



12 



71 



29 



42 



May 26 



...do 



June 3 



June 14 



5 



8 



15 



19 



129 



13 



48 



24 



24 



May 27 



June 1 



June 8 



...do 



5 



12 



14 



18 



169 



14 



40 



25 



15 



May 28 



...do 



June 11 



June 15 



4 



14 



15 



18 



59 



15 



13 



5 



8 



May 29 



June 20 



June 20 



June 25 



22 



22 



6 



27 



3 



16 



32 



16 



16 



May 30 



June 2 



June 8 



June 8 



3 



9 



7 



9 



11 



■ 17 



75 



32 



43 



May 31 



June 3 



June 4 



June 26 



3 



4 



24 



26 



53 



13 



75 



26 



49 



June 1 



...do 



June 18 



June 29 



2 



17 



27 



28 



220 



19 



50 



16 



34 



June 2 



June. 4 



June 20 



...do 



2 



18 



26 



27 



167 



20 



50 



18 



32 



June 3 



...do 



June 9 



June 28 



1 



6 



25 



25 



374 



21 



50 



16 



34 



June 4 



June 5 



June 12 



...do 



1 



8 



24 



24 



274 



22 



29 



9 



20 



June 5 



June 8 



June 18 



...do 



3 



13 



21 



23 



210 



23 



7 



4 



3 



June 6 



June 26 



June 26 



June 27 



20 



20 



2 



21 



6 



24 



14 



4 



10 



June 7 



June 12 



June 15 



June 29 



5 



8 



18 



22 



194 



25 



:-3 



5 



8 



June 8 



June 16 



June 30 



June 30 



8 



22 



15 



22 



34 



26 



17 



8 



9 



June 9 



June 12 



June 15 



June 28 



3 



6 



17 



19 



79 



27 



26 



6 



20 



June 10 



June 13 



June 21 



June 29 



3 



11 



17 



19 



-31 



28 



9 



5 



4 



June 11 



June 20 



June 23 



June 25 



9 



12 



6 



14 



10 



29 



13 



9 



4 



June 12 



June IS 



June 27 



June 29 



6 



15 



12 



17 



90 



30 



12 



5 



7 



June 13 



June 17 



June 21 



July 1 



4 



8 



15 



18 



267 



31 



13 



4 



9 



June 16 



June 23 



June 29 



...do 



7 



13 



9 



15 



21 



32 



11 



Averag* 

 Maximi 

 Minimi. 



3 



8 



June 20 



June 26 



June 30 



July 10 



6 



10 



15 



20 



68 



6.87 



23 



1 



13.43 

 34 



4 



15.03 



27 



1 



20.90 



34 



9 









































Number of male moths 372 



Number of female moths 452 



Total number of moths S24 



Total number of eggs 2, 771 



Average number of eggs per female moth 6. 13 



Number of eggs per female moth. — Of the moths in these cages, 

 452 were females. These deposited 2,771 eggs, or an average of 

 6.13 eggs per female, as shown in Table 19. 



Length of life of moths. — Male moths lived an average of 16.65 

 days; females, 17.73 days. These data are detailed in Table 20. 

 The average life was somewhat longer than in 1919, owing to the 

 cooler weather. 



