68 



BULLETIN 1235, U. S. DEPARTMENT OF AGRICULTURE. 



Table 57. — Oviposition by individual codling moths of the spring brood, Yakima, 



Wash., 1919 — Continued. 

 SUMMARY. 



Maxi- Mini- 

 mum. ' mum. 



Number of days before oviposition 



Number of days from emergence to last oviposition 



Number of days of oviposition 



Number of days on which oviposition occurred 



Number of days female moth lived after last oviposition . 



Total length of life of female moth in days 



Number of eggs deposited by one female moth 



Number of eggs deposited by one female moth in one day 



19 



3 



31 



4 



22 



1 



10 



1 



14 



1 



33 



3 



36 







38 







Moths of the spring brood, 1919. — Twenty-one pairs of spring-brood 

 moths were segregated in 1919, and the results are given in Table 57. 

 The average length of life of the females was 16.35 days, as compared 

 with 16.91 for females conrmed in battery-jar cages (see Table 4). 

 The average number of eggs per female in the individual jars was 

 8.24, while 300 females in the larger cages averaged only 6.36 eggs 

 (see Table 3). The periods in the life of the moths in this table are 

 not comparable with those of Table 3, which gives the data for all 

 moths in each cage rather than for each individual moth. The 

 largest number of eggs deposited by a female in one day was 38 and 

 during her life 86. 



No satisfactory oviposition records for individual moths were 

 obtained in 1920. 



Moths of the spring brood, 1921. — In 1921, six pairs of spring- 

 brood moths were segregated on May 29 and May 31 each, as shown 

 in Table 58. A comparison with Table 35 will show the average 

 length of life of 723 females confined in battery jar cages to be 13.85 

 days, while the average life of 12 females confined in pairs was 

 14.75 days. These females laid 288 eggs, an average of 24. The 



of 



them being the maxi- 



female of pair No. 2 deposited 94 eggs, 47 



mum daily oviposition for a single female. The average egg deposi 



tion for the two years was 13.97 eggs per female. 



Table 58. — Oviposition by individual codling moths of the spring brood, Yakima, 



Wash., 1921. 









Date of— 



Number of days— 



44 



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Days. 



Days. 











1 



May 29 





June 17 



June 2.1 



7 



L3 



19 



6 



25 



7 



19 



2. 7 



7 



2 



...do.... 



June 1 



June Q 



June 16 



3 



'.) 



11 



i 



L8 



8 



94 



11.8 



47 



3 



...do.... 





...do 



J line 1 1 



2 



ID 



11 





16 



S 



89 



ii. i 



44 



i 



...do.. .. 



June '-' 



.lime 1 1 



June 12 



■1 



10 



13 



1 



14 







6. 1 



15 



. 00 . , 



June 7 



June 22 



J HIM' 23 



i» 



16 



24 



1 



25 



3 



10 



:>. 3 



7 



6 



...do... 





.lime .; 



June 1 1 



;, 



1 



5 



8 



V.i 



1 



i 



1.0 



I 







June 8 



June 6 



...do 



6 



1 



6 



« r > 



11 



1 



1 



1.0 



1 



8 





June 8 



June 8 



June in 



8 



1 



8 



•J 



10 



1 



1 



1.0 



1 



10 



.. do.'.... 







June '.» 

 June 12 











12 



...... 





 3 







...do 



June -i 



June 8 



1 



."> 



8 





1.5 



2 



II 

 12 



.. .do.... 







.hill'' 7 

 lime 17 











i 

 17 



...... 





 15 









.him- :; 



June 8 



:i 



6 



8 







3.0 



6 













45 























