66 



BULLETIN 932, U. S. DEPARTMENT OF AGRICULTURE. 



THE SECOND GENERATION. 



Eggs of the Second Brood. 



Time of deposition. — As given in Table XL VI, eggs of the second 

 brood were deposited from July 3 to August 31, inclusive, and dur- 

 ing this period 46,410 eggs were laid. These data were obtained by 

 confining the moths that emerged from the larvae collected in the 





A / 



























50 



24-00 

 2300 

 2200 

 2/00 

 2000 



V 



v 



A 



X 



\ 



















V 



V 



V 



r 



V 





_& 















A 



























V / 



















































9 









\ 











/ ■_ 



65 





















\ 















/300 



1700 



/600 



ISOO 



{$ l<H)0 



vj /300 



d /ZOO 



ki //oo 

 ^ /ooo 



^ 90O 



eoo 



700 



eoo 



SOO 

 <3-00 

 OOO 

 ZOO 



















































































I 





j 











\ 





















< 



V 





V 













i 





















I 

































% 







i L 



i 























\\ 































* 



































































i 

































i 





\ 



















I 













V 































N 





















1 























/ 



1 





























/ 































J 





























































1 



,N 







. 





1 1 1 1 



1 1 1 1 





i i i i 



i iV*_ 



i*4 ' ' 





JULY rtUGUST SEPTEMBER 



FIG. 25. — Time of deposition of eggs of the second brood of the codling moth, Grand 



Junction, Colo., 1916. 



field, using all of the moths that issued up to August 13, inclusive. 

 The greatest number of eggs laid on any one day was 2,333, and 

 these were deposited on August 2. The time of egg deposition is 

 shown graphically with average daily temperatures in figure 25. 



