88 



BULLETIN 429, U. S. DEPARTMENT OF AGRICULTURE. 



Moths of the spring brood in 1912 were first in evidence April 12 

 and continued to emerge to May 28. In 1913 the spring brood of 

 moths was out from April to early June. . 



Female moths of the spring brood in 1912 lived on the average 8.47 

 days and in 1913. 12.88 days. Male moths in 1912 lived 6.7 davs. 



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Fig. 17. 



-Diagram showing the seasonal history of the codling moth at Roswell, X. Mex., in 1913. 

 (Original.) 



In 1912 oviposition of the spring brood of moths began April 16, 

 continuing 45 days, while in 1913 first eggs of this brood were noted 

 May 1. The time required for first-brood eggs to hatch in 1912 was 

 9.05 days, with a range of 5 to 13 days, whereas in 1913 eggs of this 

 brood hatched on an average in 5.96 days, with a range of from 4 to 

 11 days. 



