CODLING MOTH IN COLORADO. 



17 



Table VII. — Length of life of male and female codling moths of the spring 

 Irood m captivity: Summary of records of 2,745 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 



9 

 9 



4 

 14 

 29 

 46 

 63 

 79 

 49 

 77 

 65 

 71 

 99 

 79 



Days. 

 1 

 2 

 3 



! 



7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 



5 

 3 

 5 

 11 

 12 

 18 

 41 

 39 

 72 

 77 

 79 

 88 

 97 

 98 



Days. 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 



61 

 58 

 58 

 50 

 41 

 65 

 43 

 38 

 26 

 27 

 21 

 25 

 10 

 17 



Days. 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 



95 



99 

 88 

 73 

 72 

 91 

 69 

 36 

 37 

 33 

 28 

 24 

 14 

 11 



Days. 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 



Total. 



8 

 11 

 4 

 6 

 5 

 3 

 2 

 1 

 

 

 



Days. 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 



15 

 6 

 4 

 5 



10 

 2 

 3 

 

 

 1 

 1 



1,283 



Total. 



1,462 



Average length of life of male moths, 14.59 days; female moths, 15.86 days. 

 Maximum length of life, male moths, 36 days; female moths, 39 days. 

 Minimum length of life of male moths, 1 day; female moths, 1 day. 



THE FIRST GENERATION. 



Eggs of the Fiest Beood. 



Time of egg deposition.— The first eggs of this brood were de- 

 posited on May 13 in a cage in which were confined some of the 

 earliest moths of the spring brood, emerging on different dates. 

 The deposition of the eggs, as shown in Table VIII, continued daily 



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Fig. 3. — Time of deposition of eggs of the first brood of the codling- moth, Grand 



Junction, Colo., 1915. 



up to and including July 8, with the exception of May 19 and 20, 

 on which days no eggs were laid owing to the imf avorable weather 

 conditions previously mentioned (see p. 13). The greatest number 

 of eggs deposited on any one day was 1,379, as will be noted in the 



19552°— 21 2 



