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. 



ft 



Complete life cycle of first generation. 



Number of days. 



Average. 



Maximum. 



Minimum. 





9.05 

 21.52 



5.24 

 12.11 



2.7 



13 

 27 

 12 

 19 

 6 



5 





15 





2 





9 





1 







Total 



50.62 



77 



32 







THE SECOND GENERATION. 



THE SECOND BEOOD OF 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 Roswell, 



N. Mex., 1912. 





Num- 

 ber of 

 eggs. 



Date of — 



Days for— 



Observation No. 



Ovipo- 

 sition. 



Appear- 

 ance of 

 red 

 ring. 



Appear- 

 ance of 

 black 

 spot. 



Hatch- 

 ing. 



Red 

 ring. 



Black 

 spot. 



In- 

 cuba- 

 tion. 



l 



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 

 16 

 16 

 17 

 17 

 18 

 18 

 19 

 19 

 20 

 21 

 22 

 23 

 23 

 24 

 24 

 25 

 25 

 26 

 26 

 27 

 27 

 28 



June 16 

 20 

 20 

 20 

 20 

 20 

 20 

 22 

 22 

 23 

 24 

 25 

 26 

 26 

 27 

 27 

 28 

 28 

 28 

 28 

 29 

 29 



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 

 1 

 2 



June 21 

 23 



2 



■i 



6 

 6 

 6 

 5 

 6 

 5 

 5 

 5 

 5 

 4 

 4 

 5 

 4 

 5 

 3 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 



7 



2 



7 



3 



24 ^ 



8 



4 



23 



24 



24 



25 



25 



26 



25 



27 



28 



28 



29 



29 



30 



30 



July 1 



1 



2 



2 



3 



3 



3 

 3 

 2 

 2 

 3 

 3 

 3 

 3 

 3 

 3 

 3 

 2 

 3 

 3 

 3 

 2 

 2 

 2 

 2 

 3 



6 



5 



7 



6 



6 



7 



7 



8 



6 



9 



7 



10 



5 



11 



6 



12 



6 



13 



5 



14 



6 



15 



5 



16 



6 



17 



5 



18 



6 



19 



5 



20 



6 



21 



5 



22 



6 

 5 



»„..„„„„,„„„„„. 



