72 



BULLETIN 932. U. S. DEPARTMENT OF AGRICULTURE. 



Table XLVIII. — Length of cocooning period of transforming codling moth larvce 

 of the second brood, Grand Junction, Colo., 1916. 



Larvae 

 left fruit. 



Num- 

 ber of 

 indi- 

 viduals. 



Length of cocooning period in specified days, 

 being the time from leaving the fruit to the 

 time of pupation. 



Ave. 



Max. 



Min. 



2 



3 



4 



5 



6 



7 



8 



9 



10 



12 



14 



1 



July 23 

 24 

 25 

 26 



27 



28 



29 



30 



31 



Aug. 1 



2 



3 



4 



5 



6 



7 



8 



9 



10 

 11 

 13 

 14 



Total... 



2 



8 



6 



15 



18 



15 



13 



12 



19 



10 



17 



8 



6 



7 



3 



2 



4 



1 



1 



1 



2 



1 







2 

 4 

 1 

 5 

 8 

 9 

 8 

 2 

 5 

 5 

 5 

 4 

 4 

 2 

 1 

 2 



















Days. 

 4.00 

 4.75 

 4.83 

 4.80 

 4.61 

 4.27 



Days. Days. 

 4 4 







2 

 5 

 8 

 9 

 3 

 2 

 3 

 7 

 2 

 5 

 1 

 2 

 3 

 2 



2 















6 

 5 

 6 

 6 



5 

 5 

 7 

 6 



14 

 8 

 5 

 6 

 5 

 4 



12 

 6 



10 

 9 



10 

 5 



4 

 4 

 4 

 4 

 3 

 3 

 3 

 3 

 3 

 4 

 4 

 4 

 2 

 4 

 4 

 5 

 6 

 10 

 9 

 7 

 5 























2 

 1 

































2 

 3 



7 

 2 



1 



1 























3.92 

















3.67 

 4.89 

 4.50 

 5.65 

 5.13 

 4.33 

 4.43 

 4.67 

 4.00 

 7.50 

 6.00 

 10.00 

 9.00 

 8.50 

 5.00 



3 

 2 



5 

 2 



2 























1 











1 







1 





















1 





1 

















































1 



1 



1 



1 









1 































1 





















1 

















1 





1 













1 

































171 



1 



15 



67 



56 



20 



6 



1 



1 



2 



1 



1 



4.80 14 



2 



Pup^ of the Second Brood. 







A 











: » 







a/1 



\ 



J 



V 



j 





A 





V 



V 



V* 



\ 

















/ 













a J 



i 



s < 



!■ 1 



! 



£H 



5 i 



Tzme 0/ pupation. — The insectary reared larvae of the second brood 

 began pupating July 27, when 2 individuals transformed. The 



,. number of larvae transforming 

 daily increased up to August 1 

 and, as will be seen in Table XLIX 

 and figure 27, 23 individuals pu- 

 pated on this date. The last pu- 

 pation occurred August 23. 



Length of the pupal stage. — 

 Data on the length of the pupal 

 stage of 160 pupae of the second 

 brood were obtained. These ob- 

 servations are recorded in Table 

 L, and, as shown therein, the ob- 

 servations included pupae that 

 transformed from July 27 to Au- 

 gust 23. Owing to the fairly even climatic conditions during this 

 period there was little difference in the length of the pupal stage, 

 the range being from 11 to 16 days, with an average of 13.51 days. 



Fig. 27. — Time of pupation of second brood 

 of the codling moth, Grand Junction, 

 Colo., 1916. 



