BIOLOGY OF AKIZONA WILD COTTON WEEVIL. 



17 



Table V. — Developmental period of Anthonomus grandis thurberiae in cotton squares, 

 Arizona, 1914; eggs deposited before Sept. 1. 



Date 



Date 



adults 



emerged. 



Males. 



Females. 



Adult 



emerged 



but date 



not 



noted. 





eggs 

 depos- 

 ited. 



Period. 



Num- 

 ber 

 weevils. 



Weevil 

 days.* 



Period. 



Num- 

 ber 

 weevils. 



Weevil 

 days. 1 



Stages found upon 



examination of 



squares. 



July 6 



7 



July 24 

 July 25 

 July 22 

 July 23 

 July 24 

 July 25 

 July 26 

 July 25 

 Julv 28 



...do 



July 27 

 July 28 

 Aug. 1 

 July 29 



July 30 

 Aug. 1 

 July 29 

 July 30 

 Aug. 1 

 Aug. 4 

 Aug. 1 

 .do 



Days. 

 18 



18 



1 



1 



18 

 18 



Days. 











18 

 14 

 14 



1 

 1 

 2 



18 

 14 



28 







8 







9 



14 



15 



1 



1 



14 

 15 







9 







11 



14 

 15 



1 

 1 



14 

 15 







11 













12 



13 

 16 

 15 

 13 



2 

 1 

 1 

 1 



26 

 16 

 15 

 13 







12 













13 













14 













14 



14 

 18 

 14 



15 



1 

 1 

 1 



1 



14 

 18 

 14 



15 







14 













15 



14 



15 

 17 

 13 

 14 

 16 

 18 

 15 



3 



1 

 1 

 1 

 1 

 2 

 2 

 2 



42 



15 

 17 

 13 

 14 

 32 

 36 

 30 





1 adult died in cell 



15 





without emerging. 



15 







16 













16 



14 

 16 



2 

 2 



28 

 32 





Do. 



16 







16 







17 



15 

 14 

 16 

 14 

 15 

 16 

 14 



3 

 3 



1 

 1 

 2 

 1 

 2 



45 

 42 

 16 

 14 

 30 

 16 

 28 





1 male dead. 



18 





1 adult dead in cell. 



18 



Aug. 3 

 Aug. 2 

 Aug. 3 

 Aug. 4 

 Aug. 3 

 Aug. 7 

 Aug. 11 

 Aug. 8 

 Aug. 10 

 Aug. 13 

 Aug. 7 

 Aug. 10 

 Aug. 12 













19 



14 



1 



14 







19 







19 













20 



14 

 15 



1 

 1 



14 

 15 







23 







23 



19 



1 



19 







24 



15 

 17 

 20 

 13 

 16 



1 



1 

 1 

 1 

 1 



15 

 17 

 20 

 13 

 16 







24 



17 



1 



17 







24 



21 





25 











25 



16 



18 



2 

 1 



32 



18 







25 







27 









31 





28 



Aug. 12 

 Aug. 17 



...do 



Aug. 18 

 Aug. 21 

 Aug. 19 

 Aug. 20 

 Aug. 30 

 Sent. 11 



15 

 18 

 16 



1 

 1 



1 



15 

 18 

 16 











30 













Aug. 1 

 1 













17 



1 



17 







2 



19 

 16 

 17 

 19 

 14 



1 



1 



1 

 1 



1 



19 

 16 

 17 

 19 

 14 







3 













3 













11 













28 

























Total.. 







38 



592 

 15.6 





33 



504 

 15.3 



2 



4. 



Averag 





















Total weevils of 



71 

 15.4 







both sexes. 

 Average r>eriod 







for bo 



th sexes. 



















1 "Weevil days ' ' is the term applied to the sum of the time periods experienced by the various individuals 

 during the course of the observations. 



2 Female. 

 » Male. 



At the close of the experiment in November all squares were exam- 

 ined and the following stages were found remaining in them : 9 dead 

 adults, 5 live adults, 7 live pupae, and 12 live larvae. The live adults 

 were found only in squares receiving eggs after October 14, so it is 

 quite possible that they would still have emerged. The immature 

 stages were in the later lots of squares and probably had not had 

 time to become adult. 



