GRAPE-BERRY MOTH IN NORTHERN OHIO. 

 LENGTH OF PUPAL STAGE OF FIRST-BROOD PUP^!. 



15 



Table XX. — Time of cocooning and length of pupal stage of 90 individuals of the first- 

 brood pupx of the grape-berry moth, Sandusky, Ohio, 1917. 



UNSPRAYED FOLIAGE FOR COCOONING. 



Number of larva?-. 



Bate of pupation. 



Date of 

 moth 

 emer- 

 gence. 



Days 



in pupal stage. 





<?. 







§ 



Total. 



S 



? 



§ 





3 

 4 

 7 

 8 

 2 

 1 

 1 

 2 

 8 

 1 

 4 

 2 

 5 

 5 

 2 

 1 

 2 

 1 





3 

 4 

 9 

 11 

 3 

 1 

 1 

 3 

 9 

 1 

 5 

 3 

 5 

 7 

 2 

 1 

 2 

 1 



Aug. 4 



Aug. 16 

 Aug. 18 

 ...do 







12 

 14 

 13 

 14 

 14 

 15 

 16 

 12 

 13 

 14 

 12 

 13 

 12 

 13 

 14 

 11 

 12 

 16 









do 







2 





Aug. 5 



13 

 14 

 14 





3 





do 



Aug. 19 

 Aug. 21 

 Aug. 22 

 Aug. 23 

 Aug. 20 

 Aug. 21 

 Aug. 22 

 Aug. 21 

 Aug. 22 

 ...do 





1 













do 









do 









1 



Aug. 8 







1? 



1 



do 



13 









do 







1 



Aug. 9 







1?1 



1 



do 



13 









Aug. 10 





2 





do 



Aug. 23 

 Aug. 24 

 Aug. 22 

 Aug. 23 

 Aug. 27 



13 









do 









Aug. 11 











do 



do 

























10 



59 



2 



71 





13.4 



13.11 





I 1 } 











SPRAYED FOLIAGE FOR COCOONING. 



Number of larvo". 



Date of pupation. 



Pate of 

 moth 

 emer- 

 gence. 



Days in pupal stage. 



<? 







§ 



Total. 



S 



9 



9\ 





1 

 l 

 3 

 2 

 1 

 1 

 1 

 1 





1 

 1 

 3 

 2 

 1 

 2 

 1 

 1 

 1 

 2 

 1 

 2 

 1 



Aug. 8 



Aug. 21 

 Aug. 22 

 Aug. 23 

 Aug. 24 

 Aug. 25 

 Aug. 23 

 Aug. 24 

 Aug. 23 

 Aug. 27 

 Aug. 26 

 Aue. 27 

 Aug. 28 

 Aug. 30 





13 

 14 

 14 

 15 

 16 

 13 

 14 

 12 









do 













Aug.9 











do 



do 

















1 



Aug. 10 







13 





do 











Aug. 11 







1 





do 



16 







2 

 1 

 1 

 1 





Aug. 12 



14 

 15 

 IP 

 18 









do 







1 





do 



16 









do 















2 



16 



1 



19 





16 



15 





IS 











In Table XX the length of the pupal stage of 90 individuals is 

 given. The average length of the stage was 13.4 days for males and 

 13.11 for females, all on unsprayed foliage. On sprayed foliage the 

 average length of the period was 16 days for males and 15 for females. 



LENGTH OF TIME SPENT IN THE COCOON BY FIRST-BROOD 



INDIVIDUALS. 



The average length of time in the cocoon on unsprayed foliage is 

 shown in Table XXI to be 15.52 days for males with 32 days as the 

 maximum period and 9 days as the minimum. For females on un- 

 sprayed foliage 14.62 days was the average period, 32 days the 



