.::::: 



THE GEAPE-BEEEY MOTH. 



43 



Table XIX gives the emergence record of 279 moths of the spring 

 brood for the season of 1908. There is a variation of several days 

 in the dates of the maximum emergence of the moths for the three 

 seasons, the maximum emergence being nearly a week earlier in 

 1908 than in 1907 and 1909. In each instance, however, the period 

 of maximum emergence of the moths coincided quite closely with 

 the period of full bloom of the grape. 



Table XIX. — Time of emergence of moths of the grape-berry moth in the spring of 1908, 



North East, Pa. 



Date of 



Num- 



Date of 



Num- 



Date of 



Num- 



Date of 



Num- 



emer- 



ber of 



emer- 



ber of 



emer- 



ber of 



emer- 



ber of 



gence. 



moths. 



gence. 



moths. 



gence. 



moths. 



gence. 



moths. 



June 1 



6 



June 19 



15 



July 3 



3 



July 15 



1 



June 7 



5 



June 20 



15 



July 5 



1 



July 16 



1 



June 8 



17 



June 21 



1 



July 6 



2 



July 17 



1 



June 9 



7 



June 22 



7 



July 8 



1 



July 19 



1 



June 10 



12 



June 23 



8 



July 9 



1 



July 20 



2 



June 12 



16 



June 24 



9 



July 10 



1 



July 22 



1 



June 13 



30 



June 25 



4 



July 11 



1 



July 23 



2 



June 15 



14 



June 26 



3 



July 12 



1 



July 25 



1 



June 16 

 June 17 





June 29 

 July 1 



11 

 1 



July 13 

 July 14 



1 



4 







17 



Total . 



279 



June 18 



33 















Figure 14 gives a graphic description of the rate of emergence of 

 the spring brood of moths for 1908, showing that the maximum 

 number of moths emerged after June 13 — about the date that grapes 

 normally commence to blossom. 



Fig. 14. — Diagram showing the time of emergence of the spring-brood moths of the grape-berry moth in 

 1908, at North East, Pa. (Original.) 



The first record of oviposition in 1908 was made of eggs found 

 in very small berries in rearing cages June 17. No record of the 

 egg stage of the first brood was secured, on account of great diffi- 

 culty in getting moths to oviposit in confinement. The larval period 



