THE CODLING MOTH ON PEARS IN CALIFORNIA. 



23 



Table VII. — Length of time as larva in cocoon, length of pupal stage, and total time 

 spent from leaving fruit to emergence of adult, Walnut Creek, Cal.— Continued. 





Date of— 



Days for — 



Individual No. 



Larva 



leaving 



the fruit. 



Pupa- 

 tion. 



Emer- 

 gence of 

 moth. 



Making 

 of cocoon. 



Pupal 

 period. 



Total 



period in 



cocoon. 



79 



June 18 

 19 

 19 

 19 

 19 

 19 

 21 

 21 

 21 

 21 

 21 

 21 

 21 

 21 

 21 

 21 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 26 

 26 

 26 

 26 

 26 

 26 



June 24 



24 



27 



24 



24 



29 



29 



29 



30 



28 



29 



29 



28 



29 



29 



29 



29 



30 



30 



29 



30 



July 1 



2 



2 



2 



2 



3 



1 



1 



2 



4 



2 



July 13 

 11 

 13 

 10 

 10 

 13 

 13 

 13 

 15 

 13 

 13 

 20 

 13 

 16 

 12 

 12 

 29 

 21 

 21 

 20 

 16 

 16 

 18 

 16 

 16 

 20 

 20 

 16 

 16 

 21 

 21 

 22 



6 

 5 



8 

 5 

 5 



10 

 8 

 8 

 9 



' 7 

 8 

 8 

 7 

 8 

 8 

 8 

 5 

 6 

 6 

 5 

 6 

 7 

 8 

 8 

 8 

 8 

 7 

 5 

 5 

 6 

 8 

 6 



19 

 17 

 16 

 16 

 16 

 14 

 14 

 14 

 15 

 15 

 14 

 21 

 15 

 17 

 13 

 13 

 30 

 21 

 21 

 21 

 16 

 15 

 16 

 - 14 

 14 

 18 

 17 

 15 

 15 

 19 

 17 

 20 



25 



80 



22 



81 



24 



82 



21 



83 



21 



84.. 



24 



85 



22 



86 



22 



87 



24 



88. 



22 



89 



22 



90 



29 



91 



25 



92 



25 



93.. 



21 



94 



21 



95 



35 



96 



27 



97 



27 



98 



26 



99 



22 



100 



22 



101 



24 



102 



22 



103 



22 



104 



26 



105 



24 



106 



20 



107 



20 



108 



25 



109 



25 



110 



26 







Total period from leaving of fruit by larva to emergence of moth: Days. 



Average 25. 69 



Maximum 47. 00 



Minimum 20. 00 



SUMMARY. 



Length of 





Length of 





Length of 





Length of 





time larvae 



No. of 



time larvae 



No. of 



time larvse 



No. of 



time larvae 



No. of 



and pupae 



indi- 



and pupee 



indi- 



and pupae 



indi- 



and pupae 



indi- 



remain in 



viduals. 



remain in 



viduals. 



remain in 



viduals. 



remain in 



viduals. 



cocoon. 





cocoon. 





cocoon. 





cocoon. 





Bays. 





Days. 





Days. 





Days. 





20 



2 



25 



21 



30 



3 



36 , 



1 



21 



9 



26 



16 



31 



1 



38 



2 



22 



13 



27 



12 



34 



2 



39 



1 



23 



5 



29 



4 



35 



2 



47 



1 



24 



1 



15 















FIRST-BROOD MOTHS. 



Moths began to emerge June 17 from larvse and pupae collected 

 under bands June 5, reaching a maximum emergence some two weeks 

 later, July 4 to 15. Eggs were plentiful on fruit and foliage of 

 unsprayed trees July 7, indicating that many moths were out pre- 

 vious to that time. The first moths from larvse maturing in wormy 

 fruit brought into the laboratory emerged June 22, but comparatively 

 few emerged from this time until early July. June 28 to 30 many 

 recently shed pupal skins were found under some old burlap bands 

 and in cracks and crevices of bark on unsprayed trees. 



