BIOLOGY OP ARIZONA WILD COTTON WEEVIL. 



19 



Table VII. — Developmental period of Anthonomus grandis thurberiae in cotton bolls, 

 Agua Caliente ranch, Arizona, 1914- 





Date 



adults 



emerged. 



Males. 



Females. 



Condition found at examination 

 of bolls at close of experiment 

 on Nov. 10, 1914. 



eggs 

 depos- 

 ited. 



Period. 



Num- 

 ber 

 weevils. 



Weevil 

 days. 



Period. 



Num- 

 ber 

 weevils. 



Weevil 

 days. 



July 13 

 23 



July 30 



Days. 

 17 



1 



17 



Days. 















1 live female in cell, 2 dead larvae. 



24 

















1 live female, 2 pupae, and 1 larva 



25 

















dead. 

 1 live and 1 dead adult in cells. 



27 



Aug. 17 



21 



1 



21 











28 









Do. 



30 

















Do. 1 



Aug. 1 

 2 

















Do.i 



Aug. 25 



23 



1 



23 









1 male has emerged. 



4 









1 dead adult in cell.i 



7 



Sept. 4 









28 



1 



28 



Do.i 



13 









1 live pupa in cell. 



20 



Sept. 7 









18 



1 



18 





24 









1 dead adult in cell. 1 



28 

















1 female emerged before Sept. 22. 

 3 dead adults in cells. 



30 

















31 

















1 male alive and 1 female dead in 



Sept. 1 



9 



Sept. 22 



21 



1 



21 



21 



1 



21 



cells. 

 1 female alive, 2 adults dead. 

 1 male alive in cell. 



3 

















1 male emerged, 1 adult and pupa 



dead. 

 1 male alive in cell. 



4 

















11 

















2 adults dead. 



12 

















1 live female. 



14 

















1 male has emerged. 



17 

















1 male, 1 female emerged; 1 male 

 alive. 



2 adults alive, 2 adults dead. 



19 

















21 

















3 males emerged, 1 male alive in 



cell. 

 2 males emerged, 3 adults alive in 



23 

















27 

















cell; 1 male dead in cell. 

 1 male emerged, 1 male and 1 fe- 

 male alive m cell, 1 male dead in 

 cell. 



29 

















Oct. 1 



















3 

















female alive in cell, 1 larva alive 

 in cell. 

 1 female emerged, 1 adult dead in 

 cell. 



5 

















7 



















9 



















12 



















14 



















16 

















4 pupae and 1 larva alive in cell. 

 2 pupae and 1 larva alive in cell. 



19 

































Total 





4 



82 

 20.5 





3 



67 

 22.3 





Averag 























Total weevils, 

 both sexes 



Average period, 

 both sexes 







2 



1.4 









1 These adults were evidently killed by proliferation. 



From this table it is seen that the results of rearings in cotton 

 bolls differ very widely from those in cotton squares. The most 

 marked difference is in the tendency exhibite4 by the weevils to 

 remain, in hibernation in the cells in the bolls. In fact, only seven 

 weevils emerged directly after what might be termed a normal devel- 

 opmental period. . 



