26 



BULLETIN 911, U. &., DEPARTMENT OF AGRICULTURE. 



FIRST GENERATION. 



TIME OF COCOONING AND LENGTH OF TIME IN THE COCOON OF FIRST- 

 BROOD INDIVIDUALS. 



Table XXX. — Time of cocooning and length of time in cocoon of the first brood of 

 the grape-berry moth, Sandusky, Ohio, 1918. 



Number of 

 larvse. 



Date 

 larvse 



left fruit. 



July 7 



July 9 

 ...do 



July 10 



July 11 



July 12 

 ...do.... 



July 13 



...do 



...do 



...do 



July 14 

 ...do 



July 15 

 ...do..... 

 ...do 



July 16 

 ...do.... 

 ...do..... 

 ...do.... 



July 17 

 ...do 



Julv 18 



...do 



...do 



Julv 19 



...do 



...do 



...do 



July ?0 



...r\0 



...do 



...do 



Julv 21 



...do 



...do..... 



July 22 

 ...do..... 

 ...do 



Julv 23 

 ...do 



July 24 



July 25 

 ...do 



July 26 

 ...do.. 

 ...do.. 



Julv 27 

 ...do.. 

 ...do.. 



July 28 

 ...do. 



July 29 

 ...do. 



July 30 

 ...do.. 



July 31 



...do. 



...do. 



Aug. 

 ...do. 

 ...do. 





Days. 



Moths 











emerged. 



In co- 

 coon. 



Total. 



Julv 23 



16 



16 



...do.... 



14 



56 



July 24 



15 



15 



...do 



14 



42 



...do 



13 



39 



...do 



12 



24 



Julv 25 



13 



39 



Julv 24 



11 



22 



July 25 



12 



12 



July 26 



13 



26 



Julv 27 



14 



14 



July 26 



12 



36 



July 27 



13 



26 



...do 



12 



60 



July 28 



13 



13 



July 29 



14 



14 



July 27 



11 



22 



July 28 



12 



36 



July 29 



13 



26 



Aug. 2 



17 



17 



July 29 



12 



108 



Julv 31 



14 



28 



July 29 



11 



77 



Julv 30 



12 



60 



July 31 



13 



143 



July 29 



10 



10 



July 31 



12 



96 



Aug. 1 



13 



39 



A.ug. 2 



14 



14 



July 30 



10 



10 



July 31 



11 



33 



Aug. 1 



12 



108 



A.ug. 2 



13 



52 



...do 



12 



36 



Aug. 3 



13 



117 



Aug. 4 



14 



98 



...do 



13 



208 



Aug. 5 



14 



196 



Aug. 6 



15 



15 



Aug. 5 



13 



234 



Aug. 6 



14 



154 



...do 



13 



78 



Aug. 7 



13 



13 



Aug. 8 



14 



112 



Aug. 6 



11 



11 



Aug. 8 



13 



104 



Aug. 9 



14 



M0 



Aug. 8 



12 



24 



Aug. 9 



13 



91 



Aug. 10 



14 



42 



...do 



13 



117 



Aug. 11 



14 



84 



Aug. 10 



12 



12 



Aug. 11 



13 



78 



Aug. 10 



11 



11 



Aug. 11 



12 



12 



Aug. 12 



12 



84 



Aug. 13 



13 



39 



Aug. 14 



14 



14 



Aug. 12 



11 



22 



Aug. 13 



12 



24 



Aug. 1-1 



13 



13 



Number of 

 larvse. 



5 

 9 

 1 

 6 

 1 

 12 

 1 

 1 

 1 

 1 

 1 

 3 

 10 

 5 

 1 

 3 

 9 

 12 

 3 

 2 

 2 

 1 

 15 

 18 

 11 

 1 

 5 

 22 

 12 

 1 

 2 

 1 

 10 

 1 

 1 

 3 

 4 

 8 

 9 

 1 

 3 

 2 

 3 

 2 

 2 

 4 

 2 

 1 

 1 

 1 

 2 

 2 

 1 

 1 

 l 

 1 

 1 

 1 

 1 



Total, 522 



Date 



larvse 



left fruit. 



Aug. 2 



...do 



...do 



Aug. 3 

 ...do 



Aug. 4 



...do 



...do 



...do..... 

 ...do..... 



Aug. 5 



Aug. 6 



...do 



...do 



...do..... 



Aug. 7 



...do 



...do..... 



...do 



...do..... 

 ...do.... 

 ...do..... 



Aug. 8 



...do 



...do 



...do 



Aug. 9 



...do 



...do 



...do 



Aug. 10 



...do 



...do 



...do 



...do 



Aug. 11 

 ...do 



Aug. 12 



...do 



...do 



Aug. 13 



...do 



...do 



Aug. 14 

 ...do 



Aug. 15 

 ...do..... 



Aug. 16 

 ...do..... 



Aug. 17 



...do 



...do 



...do 



Aug. 18 



Aug. 19 



Aug. 20 



Aug. 21 



Aug. 22 



Aug. 23 



Moths 

 emerged. 



Aug. 13 



Aug. 14 



Aug. 15 



Aug. 14 



Aug. 16 



Aug. 15 



Aug. 16 



Aug. 17 



Aug. 18 



Aug. 20 



Aug. 17 



Aug. 18 



Aug. 19 



Aug. 20 



Aug. 21 



Aug. 18 



Aug. 19 



Aug. 20 



Aug. 21 



Aug. 22 



Aug. 23 



Aug. 26 



Aug. 20 



Aug. 21 



Aug. 22 



Aug. 23 



Aug. 21 



Aug. 22 



Aug. 23 



Aug. 25 



Aug. 21 



Aug. 22 



Aug. 23 



Aug. 24 



Aug. 25 



Aug. 23 



Aug. 24 

 ...do.... 



Aug. 25 



Aug. 27 



Aug. 26 



Aug. 27 



Aug. 28 



Aug. 27 



Aug. 28 



...do 



Aug. 29 



Aug. 28 



Aug. 29 



Aug. 28 



Aug. 29 



Aug. 30 



Aug. 31 



...do 



Sept. 2 



Sept. 4 



Sept. 5 



Sept. 6 

 ...do.... 



Days. 



In co- 

 coon. 



Average days, 12.9. 

 Maximum days, 19. 

 Minimum days, 10. 



It is seen in Table XXX that first-brood larvae began to leave the 

 fruit July 7 and continued to leave until August 23. The table does 



