22 



BULLETIN 911, IT. S. DEPARTMENT OF AGRICULTURE. 



Table XXV. — Time of cocooning and number of cocoons of the second brood of the 

 grape-berry moth, Sandusky, Ohio, 1917 — Continued. 





Dates of collection of larvse. 



Total 



co- 

 coons. 



Mean 

 dailv 



Date of cocooning. 



Oct. 2 to Nov. 1. 



tem- 

 pera- 

 ture. 



Sept. 7 











6 







3 



1 



1 







7 



6 



10 



8 



9 



7 



14 



29 



26 



37 



2C 



78 



72 



48 



119 



123 



88 



80 



42 



50 



134 



93 



99 







82 



61 



16 



15 



26 



36 



2 



177 



144 



55 



121 



124 



100 



6 



7 



8 



6 



6 



2 







32 



10 



46 



1 



3 



13 



58 



1 8 











62 



9 













62 



10 















52 



11 















52 



12 















58 



13 















65 



14 















65 



15 















66 



16 









*fe 







64 



17 















64 



18 















64 



19 















67 



20 















69 



21 















60 



22 















59 



23 















57 



2! 















59 



25 















59 



26 















64 



27 















66 



28 















58 



29 















60 



30 















52 



Oct. 1 















48 



2 















52 



3 















58 



4 















54 



5 















50 



6 















44 



7 , 















50 



8 















45 



9 















43 



10 



1 













45 



11 













45 



12 



1 



1 











40 



13 











38 





1 



1 



4 



1 



2 



1 





55 



16 





50 



17 



1 





2 







49 



18 











64 



19.. 





3 



1 



1 



1 



1 



4 



1 



47 



20 



2 



40 



21 











43 



22 



1 











41 



23 













40 



24 













1 



42 



25 













42 



26 















44 



27 















42 



28 













3 



44 



29 













48 



30 



3 





1 



1 

 1 



4 



7 



31 



31 





32 



Nov. 5 











3 



46 



10 













50 





















Nov. 21 



Nov. 21 



Nov. 21 



Nov. 21 



Nov. 21 



Nov. 21 



2,309 









PERCENTAGE OF COCOONING PREVIOUS TO AND DURING GRAPE 



HARVEST. 



Table XXVI shows the time of cocooning of the larvse that left 

 the fruit in the fall of 1917. This does not necessarily indicate, 

 however, that all the larvse left the fruit before the end of grape 

 harvest, for observation showed that a considerable part of the 

 second brood of larvse were only partially grown at the time of harvest 

 and that large numbers of larvse actually left the vineyards in the 

 fruit. No accurate method of determining what part of the total 



