CODLING MOTH IN COLORADO. 



47 



temperature dropped considerably, resulting in a check to the pupa- 

 tion activity. 



Table XXIX. — Time of pupation of wintering larva? of the codling moth, Grand 



Junction, Colo., 1916. 



Date of 

 pupation. 



Num- 

 ber of 

 pupse. 



Date of 

 pupation. 



Num- 

 ber of 

 pupse. 



Date of 

 pupation. 



Num- 

 ber of 

 pupse. 



Date of 

 pupation. 



Num- 

 ber of 

 pupae. 



Date of 

 pupation. 



Num- 

 ber of 

 pupse. 



Apr. 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 



1 

 6 

 8 

 

 6 

 5 



10 

 24 

 22 

 23 

 24 



Apr. 27 



28 



29 



30 



May 1 



2 



3 



4 



5 



6 



7 



24 



36 



- 3 



9 



9 



6 



10 



18 



29 



37 



25 



May 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 



29 

 21 

 6 

 13 

 8 

 2 

 1 

 5 

 4 



10 

 12 



May 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 



6 

 1 

 3 



4 

 3 

 7 

 3 

 

 7 

 3 

 7 



May 30 

 31 

 June 1 

 2 

 3 

 4 

 5 

 6 

 12 



Total . 



6 

 2 

 2 

 1 

 

 4 

 

 2 

 1 



508 



Length of the pupal stage. — The length of the pupal stage of the 

 pupse of the spring brood was computed from 390 individuals, be- 

 ginning with five larvae that pupated April 17 and ending with one 

 that pupated June 12. The results of the observations are given in 

 Table XXX, in which it will be noted that, as the season advanced 

 with its higher temperatures, the pupal stage became shorter. Nearly 

 20 per cent of the pupse were in the pupal stage 27 days, while the 

 average length of this stage for all of the pupse was 26.80 days with 

 a range of from 13 to 36 days. 



Table XXX. 



-Length of the pupal stage of pupw of the sprmg brood of the 

 codling moth, Grand Junction, Colo., 1916. 



Date of 

 pupa- 

 tion. 



Num- 

 ber 

 of 

 indi- 

 vid- 

 uals. 



Length of the pupal stage in specified days. 



13 



14 



16 



17 



18 



19 



20 



21 



22 



23 24 



25 



26 



27 



28 



29 



30 



31 



32 



34 



36 



Apr. 17 



18 



20 



21 



22 



23 



24 



25 



26 



27 



28 



29 



30 



May 1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



5 

 7 

 4 

 6 

 8 



18 



18 



17 



19 



18 



26 



3 



5 



7 



5 



5 



13 



25 



33 



20 



22 



13 



6 



12 



6 



1 



1 





















1 



1 

 1 



2 







1 

 3 

 1 



1 

 1 





























l 





1 



' 4" 



1 



























1 





3 



2 

 5 



























.1 





































1 



1 



"2 





1 

 2 

 9 

 3 

 3 

 5 

 10 

 2 

 1 









1 























i 



2 



2 



11 



3 



12 



7 

 12 

 4 

 3 

 2 































































































1 





































6 

 10 



1 

 2 



"i" 































1 

























1 





















1 











1 

 6 

 3 

 1 

 3 



'ijj' 



6 



8 

 7 



"4' 

 l 



1 

 1 



1 





























i 



































2 

 3 



5 

 15 

 6 



12 

 9 

 3 

 5 

 4 

 4 



































i 



4 



6 



10 



1 



1 

 1 



































1 

 1 





































2 



2 







1 

























1 



1 











1 











.... 































4 

 2 

 1 





























t 

































1 



































1 







3 



1 



1 

 1 



















































































































