12 



BULLETIN 189, U. S. DEPARTMENT OF AGRICULTURE. 



FIRST-BROOD MOTHS. 



The first collection of larvae in 1912 was delayed until June 12, 

 though as none of those taken under the bands at the time had 

 pupated, the beginning of first-brood moth emergence was not seri- 

 ously affected thereby. In all 639 moths appeared in the rearing 

 cages between June 23 and August 28. (See Table VII.} 



j 80 



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MAY JUNE JULY AUGUST 



Fig. 5. — Diagram to illustrate emergence of spring-brood and first-brood moths of trie codling moth at 



Greenwood, Va., in 1912. 



Table YII. 



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

 Greenwood, Va., in 1912. (See fig. 5.) 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



June 23 



6 

 4 



17 

 62 

 71 

 67 

 29 

 27 

 65 

 30 



Aug. 1 



41 

 40 

 24 

 75 

 53 

 18 

 9 

 



27 



5... 



July 1 . . . 



9 





13 



10 



17 



13 



21 



17 



24 



21 



28 



25 



Total 



29 



639 





The seasonal appearance of the two broods of moths is given in 

 figure 5. 



Work at Greenwood was discontinued in 1913, the transformations 

 of the codling moth being apparently so nearly the same as at Char- 

 lottesville vthat almost daily observation would be necessary to 

 distinguish any variation at all, and according to the plan of work 

 followed it was impossible to take records oftener than every three 

 or four days. 



