14 



BULLETIN 189, U. S. DEPARTMENT OP AGRICULTURE. 



The collection of larvse from the bands, and the summer-brood 

 moth emergence given in Table VIII, can be better appreciated by- 

 reference to figures 6 and 7, and it is doubtful if much could be added 

 bv a detailed discussion of the season's work. 



INVESTIGATIONS IN 1912. 



SPRING-BROOD MOTHS. 



It will be noted that the records for spring-brood moth emergence 

 given in Table IX were obtained at Smithsburg, Md., and therefore 

 do not represent accurately what took place at Hagerstown. The 

 Smithsburg section is 9 miles east of Hagerstown, at the foot of the 

 Blue Eidge Mountains, and at a considerably higher elevation, and 



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Fig. 7. — Diagram to illustrate band collections of larva? of the codling moth at Hagerstown, Md., in 1911. 



the seasonal conditions at Hagerstown are somewhat in advance of 

 those at Smithsburg. However, no satisfactory record of moth 

 emergence was obtained at Hagerstown in the spring of 1912, and 

 as this was practically the only record of any value secured at Smiths- 

 burg, it is included in the report of the work in the former section. 



Table IX. — Emergence of spring-brood moths of the codling moth at 

 Smithsburg, Md., in 1912. (See fig. 8.) 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



May 30 



2 

 9 



17 

 23 

 20 



June 19 



10 



4 





23 





Total 



11 



85 



15 





