40 



BULLETIN 189, U. S. DEPARTMENT OF AGRICULTURE. 



Table XXXIV. — Record of codling-moth larvae collected under bands at 

 Pickens, W. Va., during the season of 1912. 



Date of 

 collection. 



Number 

 of larvae. 



Date of 

 collection. 



Number 

 of larvae. 



Date of 

 collection. 



Number 

 of larvae. . 



July 24.. 

 30.. 



1 

 2 



Aug. 24.. 



28.. 



31.. 



Sept. 4.. 



7 



. 11.. 



14.. 



2 

 1 

 4 

 3 

 2 

 5 

 1 



Sept. 18.. 



21.. 



25.. 



28.. 

 Oct. 5.. 



Total.. 



1 

 5 

 5 

 2 



10.. 

 14.. 

 17.. 

 21.. 



2 



1 

 1 

 2 



47 



INVESTIGATIONS IN 1913. 



SPRING-BROOD MOTHS. 



Of the 47 larvae collected in 1912, 28 wintered and transformed 

 to moths in 1913. Table XXXV shows the time of emergence. 



Table XXXV. — Emergence of spring-brood codling moths at Pickens, 

 W. Va., during the season of 1913. 



Date of obser- 

 vai ion. 



Number 

 of moths 

 emerging. 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



June 21 







8 

 8 



July 1 



S 

 4 

 



24... 





28 



8 





Total 



28 



The jars in which the larvae had wintered were examined twice a 

 week and on June 24 eight moths, which were the first of the season, 

 were found. The same number were found on June 28, and also on 

 July 1. The last were found on July 5. 



RESUME OF REARING EXPERIMENTS IN MARYLAND, VIRGINIA, AND 



WEST VIRGINIA. 



Tables XXXVI and XXXVII summarize the rearing experiments 

 of 1912 and 1913 in the different localities. 



Table XXXVI. — Resume of rearing experiments on the codling moth at five points in 

 Virginia, West Virginia, and Maryland in 1912. 



Observation. 



Hagers- 

 town, Md. 



Winches- 

 ter, Va. 



Fishers- 

 ville, Va. 



Charlottes- 

 ville, Va. 



French 



Creek, 



■ W. Va. 



Total. 





Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 





1,706 



448 

 148 



404 

 1,110 



706 



100.00 



26.26 

 8.68 



23.68 

 65.06 

 41.38 



798 



217 

 228 



219 

 342 

 120 



14 



100.00 



27.19 



28.57 



27.44 



42.86 



15.04 



1.76 



1,418 



183 

 283 



609 

 952 

 343 



100.00 



12.90 

 19.96 



42.95 

 67.14 

 24.19 



905 



164 

 247 



355 

 494 

 139 



100.00 



18.12 

 27.29 



39.23 

 54.59 

 15.36 



339 



80 



82 



134 



172 



38 



5 



100.00 



23.60 

 24.19 



39.53 



50.74 



11.21 



1.47 



5,166 



1,092 

 988 



1,721 



3,070 



1,346 



19 



100. 00 



Larvae dying from hand- 

 ling, cannibalism, etc 



Moths reared same season. . 

 Moths reared following sea- 



21. 12 

 19.12 



33.31 



Wintering larvae 



59.42 



Winter : killed larvae 



26.06 

 .36 





















