GRAPE-BERRY MOTH IN NORTHERN OHIO. 



T/ble I. — Time of leaving grapes of first-brood larvx of the grape-berry moth in 1916. 

 Fruit collected at Venice, Put-in-Bay, and Kelley's Island, Ohio. 



Date of leaving fruit. 



Number 

 of larvae. 



June 28 



1 



1 



1 



3 



1 



3 



5 



6 



4 



4 



22 



63 



28 



32 



163 



349 



151 



316 



376 



425 



346 



398 



381 



164 



29 



July 2 



4 



5 



6... 



7 



8 



9 



10 



12 



13 



14 



15 



16 



17 



18 



19 



20 - 



21 



22 



23 



24 



25 





Date of leaving fruit. 



Number 

 of larvae. 



July 26 



142 



27 



139 



28 



95 



29 



8 



30 



28 



31 



35 





27 



3 



8 



5 



10 



6 



73 



7 



70 



8 



60 



9 



59 



10 



18 



11 



12 



12 



11 



13 



29 



14 



22 



15 



12 



16 



4 



17 



6 



18 



14 







Total 



4,125 



LENGTH OF TIME OF FIRST-BROOD INDIVIDUALS IN THE COCOON. 



The time of cocooning and length of time in the cocoon for 38 

 individuals observed are shown in Table II. The maximum time is 

 19 days, the minimum 9 days, and the average 11.7 days. 



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

 grape-berry moth at Sandusky, Ohio, in 1916. 



Number of larvae. ^arv^ 



Moths 

 emerged. 



Days in 

 in cocoon. 



Total. 



Larvae collected at — 



1 1 June28.. 



i: ...do 



1 July2... 



1 July4... 



2 L.do.... 



1 1 July 5... 



1 July 6... 



1 '...do.... 



1 ...do.... 



1 j July7... 



1 L..do.... 



1 do.... 



6 do 



July 11.. 

 July 12.. 



do.... 

 July 14.. 

 July 15.. 

 July 16.. 



do.... 

 July 18.. 

 July 25.. 

 July 17.. 

 July 19.. 



do.... 

 July 21.. 



do. . . . 

 July 24.. 



do. . . . 

 July 25.. 

 July 26.. 



Average. 



Maxi- 

 mum.. 



Mini- 

 mum.. 



13 



13 

 10 

 10 

 11 

 15 

 10 

 13 

 19 

 10 

 12 

 12 

 14 

 9 

 11 

 11 

 12 

 13 



13 

 13 



10 

 10 

 22 



15 



10 

 13 

 19 

 10 

 12 

 12 

 84 

 45 

 11 

 110 

 24 

 13 



Put-in-Bay, Ohio. 



Do. 

 Venice, Ohio. 



Do. 



Do. 



Do. 

 Kelley's Island, Ohio. 



Do. 



Do. 



Do. 

 Venice, Ohio. 

 Kelley's Island, Ohio. 



Do 



5 



July 12 



July 13.. 



.do.. 



Do 



1 



Do 



10 





2 



do 



Do 



1 do 



Do 









38 



11.7 

 19 

 9 







TIME OF EMERGENCE OF FIRST-BROOD MOTHS. 



The material for securing emergence records of first-brood moths 

 included the larvse collected beginning June 20 and shown in Tables 

 I and II, and pupae collected in the field at frequent intervals. It 

 will be seen in Table III and figure 1 that moths began to emerge 

 July 11 and continued until August 31, with the greatest number on 

 August 3. A large part, 63 per cent, of this emergence came within 

 the 11-day period, July 27 to August 6. 



