CODLING MOTH IN COLORADO. 



29 



Table XVII. — Length of life of male and female codling moths of the first 

 brood in captivity; summary of records of 1,719 individual moths, Grand 

 Junction, Colo., 1915. 



Male. 



Female. 



Male. 



Female. 



Male. 



Female. 





Length 

 of life. 



Num- 

 ber of 

 moths. 



Length 

 of life. 



Num- 

 ber of 

 moths. 



Length 

 of life. 



Num- 

 ber of 

 moths. 



Length 

 of life. 



Num- 

 ber of 

 moths. 



Length 

 of life. 



Num- 

 ber of 

 moths. 



Length 

 of life. 



Num- 

 ber of 

 moths. 





Days. 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 



4 

 8 

 24 

 15 

 44 

 48 

 55 

 55 

 38 

 68 

 49 

 58 

 45 

 39 

 46 



Days. 

 1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 

 12 

 13 

 14 

 15 



1 



2 

 10 

 10 

 16 

 35 

 35 

 61 

 72 

 75 

 103 

 96 

 74 

 65 

 54 



Days. 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 



26 



29 



27 



10 



12 



16 



7 



6 



7 



8 



7 



4 



3 



2 



4 



Days. 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 



64 



39 



36 



21 



20 



13 



16 



7 



7 



3 



5 



3 



3 



3 







Days. 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 



1 

 

 

 

 



1 

 1 



1 





 



1 



Days. 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 





 

 

 

 1 

 

 

 

 

 

 





Total. 



769 



Total - 



950 





Average length of life of male moths, 11.86 days; female moths, 12.68 days. 

 Maximum length of life of male moths, 41 days; female moths, 35 days. 

 Mmi.Trmm length of life of male moths, 1 day; female moths, 1 day. 



Life Cycle of the First Generation. 



Life cycle, stock-jar feeding method. — The length of the life cycle 

 •of the first generation of the codling moth, by the stock- jar feeding 

 method, is given in Table XVIII and, as shown therein, includes 

 the time from the deposition of the egg to the emergence of the moth. 

 The complete life cycle extends from the deposition of the eggs of 

 one generation to the deposition of the eggs of the next, and it will 

 therefore be necessary to add 2.07 days, the average number of days 

 from emergence of moth to first oviposition, to the figures in Table 

 XVIII to determine the complete life cycle. It will be noted in 

 this table that the data include 221 individuals, giving the incuba- 

 tion period, and the average, maximum, and minimum length of the 

 larval feeding period, the cocooning period, the pupal period, and 

 the life cycle. The summarized averages are: Incubation period 

 9.91 days, larval feeding period 20.75 days, cocooning period 6.99 

 days, pupal period 11.64 days, and life cycle 49.30 days, complete 

 life cycle 51.37 days. 



Life cycle, bagged-fruit feeding method. — In Table XIX the life 

 cycle of the first generation of the codling moth, by the bagged- fruit 

 method, is given for 109 individuals. The summarized average 

 figures are: Incubation period 10.55 days, larval feeding period 

 22.18 days, cocooning period 5.40 days, pupal period 11.03 days, life 

 cycle 49.18 days, complete life cycle 51.25 days. 



