10 



BULLETIN 429, U. S. DEPARTMENT OF AGRICULTURE. 



FIRST BROOD OF MOTHS. 



Time of emergence. — The records of emergence of first-brood moths 

 given in Table VIII cover observations with 786 individuals. The 

 material used in this instance was secured from banded trees in 

 orchards. 



The first moth appeared June 9, while a maximum emergence 

 occurred June 23, with irregularly decreasing numbers thereafter until 

 July 22, when the last observation was made. The total emergence 

 of 786 moths covered a period of 43 days. 



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Fig. 2.— Emergence curve of codling moths of the first brood, Roswell, N. Mex., 1912. (Original.) 



A graphic description of the emergence of moths of the first brood 

 appears in figure 2. 



Table VIII. — Time of emergence of codling moths of the first brood from larvae collected 

 systematically from banded trees and kept in cages, Roswell, N. Mex., 1912. 



Date of emergence. 



Number 

 of moths. 



Date of emergence. 



Number 

 of moths. 





1 



6 



7 



15 



15 



7 



26 



21 



2 



20 



32 



16 



35 



86 



55 



9 



29 



30 



28 



24 



32 



July 1 



28 



34 



33 



29 



15 



14 



11 



11 



19 



11 



12 



17 



11 



10 



8 



1 



9 



9 



1 



1 



11 



2 



12 



3 



13 



4 



14. 



5 



15... 



6 



16. . 



7 



17 



8 



18 



9 



19 



10 



20 



11 



21 



12 



22 



13 



23 



14 - 



24 



15 



25 



16 



26 



17 



27... 



18 



28 



19 



29 



22 



30 





Total emergence, 786 moths. 



Time of oviposition. — By reference to Table IX it will be found 

 that the earliest deposition by moths of the first brood was made 

 June 14, while the last oviposition occurred July 23. Hence the 

 period of oviposition was approximately 40 days. 



