16 



BULLETIN 1235, U. S. DEPARTMENT OF AGRICULTURE. 



Table 13. — Life cycle of the first generation of the codling moth as observed by 

 rearing, bagged-fruit feeding method, Yakima, Wash., 1919. 



Date of 

 egg de- 



Num- 

 ber of 

 indi- 



In- 

 cuba- 



Larval feeding 

 period. 



Cocooning period. 



Pupal period. 



Life cycle. 1 



























position. 



vid- 



tion. 



Aver- 



Maxi- 



Mini- 



Aver- 



Maxi- 



Mini- 



Aver- 



Maxi- 



Mini- 



Aver- 



Maxi- 



Mini- 





uals. 





age. 



mum. 



mum. 



age. 



mum. 



mum. 



age. 



mum. 



mum. 



age. 



mum. 



mum. 







Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



May 26 



2 



12 



25.00 



26 



24 



5.50 



6 



5 



12.00 



12 



12 



54.50 



55 



54 



June 1 



3 



11 



24.33 



26 



22 



4.67 



5 



4 



11.67 



13 



11 



51.67 



55 



48 



1 



3 



12 



26.67 



28 



25 



4.67 



5 



4 



12.33 



13 



12 



55.67 



58 



53 



3 



5 



13 



24.00 



26 



22 



4.60 



6 



4 



12.60 



14 



10 



54.20 



59 



49 



3 



4 



14 



23.50 



25 



22 



5.00 



6 



4 



13. 00 



14 



12 



55.50 



57 



54 



4 



2 



14 



25.50 



27 



24 



5.00 



6 



4 



13.00 



13 



13 



57.50 



60 



55 



5 



6 



14 



23.17 



26 



20 



5.33 



6 



4 



17.83 



44 



11 



60.33 



88 



50 



8 



11 



12 



24.55 



30 



22 



5.36 



7 



5 



13.73 



19 



11 



55.64 



63 



50 



8 



3 



13 



22.67 



24 



21 



4.00 



5 



3 



11.67 



12 



11 



51.34 



52 



50 



12 



5 



11 



23.40 



27 



21 



5.20 



6 



5 



12.40 



14 



11 



52.00 



57 



48 



15 



4 



9 



25.25 



29 



22 



4.75 



6 



4 



22.25 



44 



13 



61.25 



80 



51 



48 



12. 25 | 24. 23 



30 



20 



5.00 



7 



3 14.19 



44 



10 



55.67 



88 



48 



1 Add 1.63 days for complete life cycle. 



THE SECOND GENERATION. 



EGGS OF THE SECONE BROOD. 



Time of deposition. — The first eggs of the second brood were 

 deposited by first-brood moths on July 15, and eggs were deposited 



i» as /a ^s «as 





Fig. 7.— Time of deposition of eggs of the second brood of the codling 

 moth at Yakima, Wash., 1919. 



daily until September 20, as shown in Figure 7. The maximum 

 period of oviposition is less decided and much longer than that of 

 the spring brood of moths (see p. 9). It extended from the latter 

 part of July until nearly the last of August, with an actual maximum 

 of 829 eggs on July 29.^ 



