36 



BULLETIN 189, U. S. DEPARTMENT OF AGRICULTURE. 



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

 French Creek, W. Va., in 1913. (See fig. 21.) 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



Date of obser- 

 vation. 



Number 

 of moths 

 emerging. 



May 6 



1 

 11 



4 

 18 

 25 



4 

 11 



9 

 19 





11 

 

 8 

 6 

 5 

 2 



10 



10 



13 



14 



17 



17 



21 



24 



20 



24 



27 



Total 



31... 



134 



June 3 





30 



BROOD 



10 O 



in O io ^ if) 

 ^ «Vl CV| (*) 



MA Y 



> »o O lo O 10 



s N f\| (\| 0) 



JUNE 



OloOlO ^ lo O Ifl 



x -n <\| (V| °5 "% "*» 



UULY AUG 



Yig. 21. — Diagram to illustrate emergence of spring-brood and first-brood moths of the codling moth 

 at French Creek, W. Va., in 1913. 



The first moth was found in the jars on May 6, the maximum num- 

 bers from May 17 to June 7, and the last on June 24. A freeze 

 occurring on the night of April 20 caught the apple trees just coming 

 into full bloom, practically destroying the entire crop of blossoms. 

 The first moth appeared 16 days after the date of the freeze, and the 

 maximum emergence was a little more than four weeks after the 

 freeze. 



FIRST-BROOD MOTHS. 



Owing to the light crop of apples only a few larvse were obtained, 

 and the number of first-brood moths emerging was insignificant. 

 Table XXIX shows the number that were obtained. 



