CODLING MOTH IN COLORADO. 



69 



nection with the control of the codling moth, the time of hatching of 

 the second brood of eggs is of great importance, as is also the time 

 when these eggs are hatching in largest numbers. It will be noted 

 in this table and in figure 26 that the larvse were appearing in 

 greatest numbers during the middle of the hatching period. The 

 maximum number of eggs, 2,098, hatched on August 8. 































































eeoc 

 z/oo 

 zooo 







































































\/V 





























; ] 



\ 















1800 

 1700 

 1600 

 /SOO 

 /+00 

 1300 



/eoo 



1IOO 

 IOOO 











































\ 





























\ 





/ 



1 























\ 



























f 



\ 





























1 



K 





/ 



























V 



















































































IS 



1 





















'o eoo 











































I 





















^ 











K 











1 













& 6C0 











\ 























\ tc 

















1 

















^ 7r 









\ 



I 







i 





I 













* 







































































...... 

























, , tT 



\i*. 





H 



s 



lr 



8 



ft 



o 

 "a 



^ 



^ » 



! 



t s 





* 



o> 



■ <! 



w 



3 



85 Ij 



aotg 



I 



75 Kl 



70Q 



§ 



65 k 



■SEPTEMBER 



Fig. 26. — Time of hatching of eggs of the second brood of the codling moth, Grand 



Junction, Colo., 1916. 



Length of the feeding period. — The data on the length of the 

 feeding period of larvee of the second brood, stock- jar method, are 

 presented in detail in Table XL VII. The records are given for 

 2,569 larva?, the dates of the entrance of which into the fruit and of 

 leaving the fruit were observed. The summarized computations 

 show that the average length of the feeding period of these larvae 

 was 28.61 days, maximum TO days, minimum 14 days. 



