THE GEAPE-BEBBY MOTH. 



31 



Table I. — Time of emergence of moths of the grape-berry moth in the spring of 1909 at 



North East, Pa. 



Date of 



Num- 



Date of 



Num- 



Date of 



Num- 



Date of 



Num- 



Date of 



Num- 



emer- 



ber of 



emer- 



ber of 



emer- 



ber of 



emer- 



ber of 



emer- 



ber of 



gence. 



moths. 



gence. 



moths. 



gence. 



moths. 



gence. 



moths. 



gence. 



moths. 



June 3 



1 



June 18 



18 



July 1 



19 



July 14 



3 



July 30 



1 



6 



2 



19 



17 



2 



18 



15 



2 



31 



1 



7 



3 



20 



23 



3 



4 



16 



6 



Aug. 1 







8 



5 



21 



32 



4 



11 



17 



3 



2 







9 



1 



22 



22 



5 



9 



19 



2 



3 







10 



2 



23 



25 



6 



4 



20 



1 



4 



1 



11 



4 



24 



21 



i 



14 



22 



2 



5 







12 



3 



25 



23 



8 



3 



23 













13 



7 



26 



24 



9 



4 



24 







Total . 



507 



14 



17 



27 



9 



10 



11 



25 











15 



5 



28 



23 



11 



6 



26 



1 







16 



14 



29 



29 



12 



6 



27 



1 







17 



26 



30 



6 



13 



12 



28 











Since the blossoming period of the grape in the Lake Erie Valley 

 occurs usually from June 13 to June 20, this emergence record of the 

 spring moths indicates that the maximum emergence takes place 

 during and after the blossoming period. This record also indicates 

 that the small percentage of webs containing larvse found in the 

 blossom clusters does not represent the full spring brood from spring- 

 emerging moths, as has been supposed by some investigators, but 

 merely represents the offspring of a very small percentage of the 

 earliest appearing moths. 



Oviposition of spring-emerging moths in confinement. — The female 

 grape-berry moth does not oviposit readily in confinement, which 

 accounts for the somewhat meager oviposition records obtained. 

 No eggs were observed in our rearing cages until the berries of the 

 grape were formed and those found were always deposited upon the 

 berries. 



Table II.- — Oviposition of spring moths of the grape-berry moth in stock jars at North, 



East, Pa., 1909. 



No. of 



Number 



Date of— 



Days— 













From 



stock jar. 



of moths. 



Emer- 



First 



Last 



Before 





emer- 







gence of 

 moths. 



ovi- 

 position. 



ovi- 

 position. 



ovi- 

 position. 



position. 



gence to 

 last ovi- 

 position. 



1 



10 



June 17 



July 1 



July 5 



14 



5 



18 



2 



30 



June 18 



June 24 



July 2 



6 



9 



14 



3 



15 



June 19 



...do.... 



June 30 



5 



7 



11 



4 



20 



June 20 



June 30 



...do.... 



10 



1 



10 



5 



46 



/June 21 

 \June 22 



|june 25 



July 5 



4 



11 



14 



6 



12 



June 23 



June 27 



July 7 



4 



11 



14 



7 



16 



June 24 



July 1 



July 1 



7 



1 



7 



8 



20 



June 25 



June 29 



July 8 



4 



10 



13 



9 



23 



June 26 



June 30 



July 12 



4 



13 



16 



10 



29 



June 29 



July 7 



July 9 



8 



3 



10 













6.6 



14 



4 



7.1 



13 



1 



12.7 

 18 



Mas 































