LIFE HISTORY OF CODLING MOTH IN PECOS VALLEY, N". MEX. 13 



Table XII. — Summary of results from experiments on the separate stages of the first 

 generation of the codling moth, Roswell, N. Mex., 1912. 



Complete life cycle of first generation. 



Number of days. 



Maximum. 



Minimum. 



Incubation of eggs 



Feeding period of larvse 



Making of cocoons 



Pupal stages 



Time before egg deposition 



Total 



9.05 

 21.52 



5.24 

 12.11 



2.7 



50. 62 



THE SECOND GENERATION. 



THE SECOND BROOD OP EGGS. 



Length of incubation. — Observations to determine the length of the 

 period of incubation of eggs of the second brood were begun June 14 

 and continued until late in July.' Eggs were deposited in large 

 numbers during that period, and very accurate data regarding the 

 length of the separate stages observed could be obtained. The 

 average length of time from date of deposition to appearance of red 

 ring was found to be 4.92 days; maximum, 4 days; minimum, 2 days. 

 The average length of time from oviposition to appearance of the 

 black spot was 4.26 days; maximum, 6 days; minimum, 3 days. 

 For the period of time covering the duration of incubation an aver- 

 age of 5.62 days is determined; maximum, 8 days; minimum, 4 days. 

 These records are found in Table XIII, 



Table XIII . — Length of incubation of second brood of eggs of the codling moth at Rosivell, 



N. Mex., 1912. 





Num- 

 ber of 



eggs. 



Date of— 



Pays for— 



Observation No. 



Ovipo- 

 sition. 



Appear- 

 ance of 

 red 

 ring. 



Appear- 

 ance of 

 black 

 spot. 



Hatch- 

 ing. 



Red 

 ring. 



Black 



spot. 



In- 

 cuba- 

 tion. 



1 



8 



68 



17 



56 



40 



15 



7 



5 



2 



3 



18 



70 



52 



27 



42 



31 



24 



24 



29 



12 



80 



43 



100 



June 14 

 10 

 16 

 17 

 17 

 18 

 18 

 19 

 19 

 20 

 21 

 22 

 23 

 23 

 24 

 24 

 25 

 25 

 26 

 26 

 27 

 27 

 2S 



June 10 

 20 

 20 

 20 

 20 

 20 

 20 

 22 

 22 

 23 

 24 

 25 

 2(i 

 2(; 

 27 

 27 

 28 

 28 

 28 

 28 

 25) 

 2!) 



July 1 



June 20 

 22 

 22 

 22 

 23 

 23 

 23 

 24 

 24 

 24 

 25 

 27 

 27 

 28 

 28 

 28 

 29 

 29 

 30 

 30 



July 1 



2 



June 21 



23 



24 



23 



24 



24 



25 



25 



26 



25 



27 



28 



28 



29 



29 



30 



30 



July 1 



1 



2 



2 



3 



3 



2 

 4 

 ■I 

 3 

 3 

 2 

 2 

 3 

 3 

 3 

 3 

 3 

 3 

 3 

 2 

 3 

 3 

 3 

 2 

 2 

 2 

 2 

 3 



6 

 6 

 (i 

 5 

 6 

 5 

 5 

 5 

 5 

 4 

 4 

 5 

 4 

 5 

 3 

 4 

 4 

 4 

 4 

 4 

 1 

 4 

 4 



7 



2 



7 



3 



8 



4 



6 



5. 



7 



6 



6 



7 



7 



B 8 



6 



i 9 



7 



1 lo:::::::::::.: 



5 



■ 11 



6 



1 12 . 



6 



i 13 





B 14 ...... - 





m is....... 





P 16 





■ 17 





18 





19 





20 





21 





22 





23 



5 



