40 



BULLETIlSr 189, U. S. DEPARTMENT OF AGEICULTURE. 



Table XXXIV. — Record of codling-moth larvse collected under hands at 

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



Date of 

 collection. 



Number 

 of larvae. 



Date of 

 collection. 



Number 

 of larvse. 



Date of 

 collection. 



Number 

 of larvae. 



July 24.. 

 30.. 



1 

 2 



Aug. 24.. 

 28., 

 31.. 



Sept. 4.. 



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 larvse 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 19 IS. 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



June 21 







8 

 8 



July 1 



8 

 4 

 



24 



5 



8.. 



28.. .. 





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 Jive 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. 



Larvae collected 



1,706 



44S 

 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 



Lar\'Ee dying from hand- 

 ling, cannibalism, etc 



Moths reared same season . . 



Moths reared following sea- 

 son 



2L12 

 19.12 



33.31 



Wintering larvae 



59.42 



Winter-killed larvae 



Parasitized larvas . ; 



26.06 

 .36 



















