CODLING MOTH IIS^ CEXTEAL APPALACHIAJJ" EEGION. 



17 



Comparison of figures 7 and 9 would suggest that, in the relative num- 

 bers of the two broods of larvae appearing under the bands, the sea- 

 sons of 1911 and 1912 were very similar. 



As has already been said, only 8.68 per cent of the 1,706 larvae 

 taken under the bands at Hagerstown in 1912 transformed to moths 

 that summer. The percentage of 26.26 that died in the rearing 

 cages from handhng, cannibahsm, disease, immaturity, and other 

 causes compares closely with that observed at other points, and 

 the rearing work was evidently done with as much care and under 

 as favorable conditions as in the localities where a much larger pro- 

 portion of the first brood transformed; 65.06 per cent wintered, 

 41.38 per cent were winter-killed, and 23.68 per cent emerged as moths 



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Fig. 9. — Diagram to illustrate band collections of larvae of the codling moth at Hagerstown, Md. , in 1912. 



in the spring of 1913. The percentage of winter-ldlled larvae at 

 Hagerstown was much larger than in other localities that year. 



SUMMARY FOR SEASON OF 1912. 



Spring-brood moths began emei^ng in rearhig cages at Smiths- 

 burg, Md., on May 30 (probably several days later than at Hagers- 

 town). First-brood lai-vae were probably entering fruit 10 to 12 

 days later (soon after Juno 1, at Hagerstown). First-brood lai-vae 

 were leaving apples in the field from June 25 to 29 to August 17 

 to 21. 



First-brood moths begun cmci^ng from field-collected material on 

 July 13. Second-brood larvae j^robably began feeding soon after 

 July 23, and w(!re leaving the fruit in numbers soon after August 21. 



77013°— Bull. 189- LO 3 



