62 



BULLETIN 429, U. S. DEPARTMENT OP AGRICULTUEE. 



Table XL VI I. — Length of life cycle of second generation of codling moth from time of 

 egg deposition to emergence of moth, Roswell, N. Mex., 1913. 



Date of egg 

 deposition. 



Num- 

 ber of 

 indi- 

 viduals. 



Moths emerged in specified days from time of deposi- 

 tion of eggs of the same generation. 



Aver- 

 age 

 days. 



Mini- 

 mum 

 days. 



Maxi- 

 mum 

 days. 



Total 

 days. 



28 



33 



34 



35 



36 



37 



38 



39 



40 



41 



42 



43 



44 



45 



46 



-- 



47 



"i 



4 



i 



5 



'1 



"i 



1 

 1 



14 



48 



'i 



1 

 2 



i 



i 

 "3 



i 



10 



49 



'i 

 1 



"i 



i 

 2 



i 



8 



50 



i 

 1 



1 



3 



51 

 1 



54 



1 



59 

 1 





13 



2 



9 



26 



14 



19 



34 



24 



32 



17 



23 



38 



26 



26 



5 



13 



23 



12 



15 



14 



6 



2 



3 



2 



7 



2 



1 



:: 

 1 



"i 

 i 



3 





12 



2 



-- 



■5 

 '3 



i 



'2 

 1 

 1 



15 



2 

 "3 



2 

 3 

 1 

 2 

 6 

 3 



27 



2 

 2 



"2 



"i 



'3 



'2 

 1 

 3 



"2 

 3 



i 

 22 



3 



"i 



3 

 3 

 1 

 1 

 1 

 2 

 2 

 1 

 3 

 5 

 2 



'3 

 4 

 1 



"i 



'2 



39 



2 



"2 

 3 



1 

 1 

 1 

 3 

 6 

 2 

 2 

 4 

 3 

 5 

 1 



'2 

 2 

 2 

 1 



i 



'2 

 5 

 1 

 3 

 6 

 3 

 5 



"2 

 12 



1 



i 



1 



'i 



50 



1 



'3 



1 

 3 

 4 

 1 

 1 

 3 

 6 

 6 

 4 

 2 

 1 



"2 

 "\ 



"i 



40 



3 



i 



2 



'2 



4 

 3 



"i 



1 

 3 

 1 

 3 



'2 

 2 

 4 

 2 



"2 

 '2 



38 



1 



'2 



3 



'3 

 4 

 1 

 4 

 6 



'4 



1 

 1 

 1 

 4 



'i 



1 



i 



38 



i 



1 



"i 

 '5 



'2 



4 

 2 



"i 



"i 



"i 



19 



41.07 



38.0 



41.3 



40.6 



42.6 



42.4 



43.1 



43.8 



38.7 



43.6 



43.3 



40.6 



41.9 



40.3 



39.8 



42.3 



40.4 



40.8 



47.8 



37.7 



38.5 



34.5 



43.3 



41.0 



42.1 



37.5 



38 

 38 

 37 

 35 

 35 

 33 

 35 

 39 

 34 

 39 

 39 

 35 

 38 

 35 

 36 

 37 

 28 

 37 

 37 

 34 

 36 

 33 

 43 

 34 

 39 

 33 



46 

 38 

 46 

 49 

 49 

 51 

 50 

 54 

 49 

 49 

 47 

 46 

 46 

 45 

 44 

 49 

 47 

 47 

 59 

 44 

 46 

 36 

 44 

 48 

 46 

 42 



534 



12 



76 



13. 



372 



14. 



1,056 

 596 



15 



16 



805 



17 



1,465 

 1,050 

 1,237 



IS. 



19. . . . 



20 



742 



21 



995 



22 



1,542 

 1,089 



23. 



24. 



1,049 



25 



199 



26 



551 



27 



931 



28 



489 



29 



668 



30. 



528 



July 1 



231 



3 



6 



69 

 130 



7 



82 



9 



295 



12 



75 









407 



41.4 







16,856 











SECOND BROOD OP MOTHS. 



Egg deposition. — A total of 38 individual female moths of the second 

 brood emerging in the interval between July 14 and August 17 were 

 isolated in order to obtain oviposition records as shown by moths in 

 confinement. Reference to Table XLVTII will show that a total of 

 4,847 eggs were deposited by the 38 females, an average oviposition 

 of 127.55 per individual. The maximum individual oviposition was 

 259 eggs. The average individual oviposition per day was 16.6 eggs, 

 and the maximum daily oviposition per female was 108 eggs. On an 

 average the length of the oviposition period was 8.3 days, although 

 the maximum length of the period was 16 days. It was also found 

 that actual oviposition by an individual female may occur on 14 

 separate days, but the average number found in this connection is 

 7.6 days. The observations showed that it was possible for oviposi- 

 tion to begin as early as one day following emergence, although the 

 average length of time was 3.68 days. The longevity of the moths 

 thus confined varied considerably, one insect living but 6 days, while 

 another individual persisted for 21 days after emergence. The 

 average length of life of the moths in this connection was 12.8 days. 



