52 



BULLETIN 932, IT. S. DEPARTMENT OE AGRICULTURE. 



average length of life of 1,281 male moths was 14.67 days, maximum 

 35 days, minimum 1 day; the average length of life of 1,457 female 

 moths was 15.73 days, maximum 39 days, minimum 1 day. 



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

 brood in captivity: Summary of records of 2,738 individual moths, Grand 

 Junction, Colo., 1916. 



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. 



I 

 Num- 

 ber of 

 moths. 



Days. 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 

 12 

 13 

 14 



9 



7 

 6 

 14 

 29 

 46 

 64 

 79 

 48 

 88 

 78 

 56 

 86 

 84 



Days. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



6 



i 



n 



12 

 18 

 41 

 40 

 73 

 75 

 77 

 93 

 98 

 99 



Days. 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 



64 

 56 

 59 

 50 

 43 

 64 

 48 

 39 

 27 

 30 

 18 

 27 

 10 

 14 



Days. 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 



96 

 96 

 88 

 70 

 68 

 94 

 70 

 41 

 40 

 27 

 23 

 23 

 14 

 14 



Days. 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 



12 

 3 

 6 

 5 

 3 

 2 

 

 

 

 



Days. 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 



13 

 6 



4 



6 ! 



4 i 



2 



3 











1 

 1 



Total.. 



1,281 



Total.. 



1,457 



Average length of life of male moths, 14.67 days; female moths, 15.' 

 Maximum length of life of male moths, 35 days; female moths, 39 c 

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



3 days. 



Fig. 



THE FIRST GENERATION. 



Eggs of the Fikst Beood. 



Time of egg deposition. — In Table XXXIV and figure 20 it will 



be observed that the 

 first eggs of the first 

 brood were deposited 

 May 19, and the last 

 July 7, the period of 

 deposition covering 

 about 7 weeks. The 

 eggs laid on the lat- 

 ter date, however, 

 were infertile, but 

 the single egg de- 

 posited July 5 com- 

 pleted its develop- 

 ment and hatched on 

 July 11. The largest 

 number of eggs laid 

 in one day was 883 on 

 June 9, and this date 

 was approximately 

 a M the middle of the 



20. — Time of deposition of eggs of the first brood of ... . , 



the codling moth, Grand Junction, Colo., 1916. OVipOSltlOn period. 























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