CODLING MOTH IN CENTRAL APPALACHIAN REGION. 7 



moth larvae appeared under the bands in considerable number 

 throughout June and July, most of those collected previous to August 

 1 transforming to adults the same season. After August 1 the num- 

 ber of larvae collected again increased considerably, the greater part 

 of those taken after this date spinning up and wintering. Sinco 

 summer-brood moths appeared June 20, it is reasonable to suppose 

 that second-brood larvae were beginning to enter the apples about 

 July 1. If we allow a slightly longer time than has been found by 

 other observers to be the minimum feeding period of the second brood, 

 we might expect second-brood larvae to be leaving the fruit by the 

 last of July to the first of August. The fruit was picked shortly after 

 October 5 and the records discontinued, although a few of the second 

 brood had not finished feeding by that time. 



Table II gives the results of the rearing experiments carried on 

 with the 905 larvae taken in the orchard in the summer of 1912. Due 

 to handling, cannibalism, disease, etc., 18.12 per cent were lost in the 

 rearing jars; 27.29 per cent emerged as moths that season; 54.59 per 

 cent wintered; 15.36 per cent were winter-killed; and 39.23 per cent 

 passed the winter and emerged as moths in the spring of 1913. 



SUMMARY FOR SEASON OF 1912. 



At Charlottesville in 1912 the spring-brood moths began emerging 

 in the early part of May. First-brood larvae began leaving the fruit 

 the early part of June. First-brood moths began emerging June 20, 

 alio whig 10 days for egg-laying and incubation; second-brood larvae 

 began feeding by July 1. After August 1 most of the larvae taken 

 under the bands belonged to the second brood. 



INVESTIGATIONS IN 1913. 

 SPRING-BROOD MOTHS. 



The emergence records of 355 moths of the spring brood at Char- 

 lottesville in 1913 are given in Table III. 



Table III. 



-Emergence of spring-brood moths of the codling moth at 

 Charlottesville, Va., in 1913. (See fig. 3.) 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



Vpr 18 



2 

 2 

 2 



7 



18 

 78 

 27 

 42 

 17 

 55 

 24 



May 21 



21 



21 



11 



10 



8 



8 



1 



1 



21 



24 



24 



27 



27 



30 



30 



June 2 



May 3 



5 



6 



8 



9 



11 





Total 



15 .. 



355 



18 





