UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 189 



Contribution from the Borean of Entomology 

 L. O. HOWARD, Chief 



Washington, D. C. 



April 12, 1915 



STUDIES OF THE CODLING MOTH IN 



THE CENTRAL APPALACHIAN 



REGION 



By 



F. E. BROOKS and E. B. BLAEESLEE, Entomological Assistants 

 Deciduous Fruit Insect Investigations 



CONTENTS 



Introdnction 



Localities in Which Investigations Were 



Made 



Nature and Extent of the Investiga 



tions 



Explanation of the Use of Terms . 

 Investigations at Charlottesville, Va 

 Investigations at Greenwood, Va. 

 Investigations at Hagerstown, Md. 

 Investigations at Winchester, Va. 

 Investigations at Fishersville, Va. 

 Investigations at French Creels, W. Va, 

 Investigations at Pickens, W. Va. . 

 Ref)uni€ of Rearing Experiments in 



Maryland, Virginia, and West Virginia 



Page 



Number of First-Brood Larvae Trans- 

 forming First Season 42 



Effect of Differences in Altitude and 

 Latitude Upon the Development of the 

 Codling Moth 42 



Relative Numbers of Larvse Ascending 

 and Descending the Trees .... 



Seasonal Effect of Weather Conditions 

 on the Different Stages of the Codling 

 Moth 



Cannibalism Among Codling - Moth 

 Larvae 46 



Natural Enemies .' 4G 



Summary ^ , 48 



44 



45 



WASHINGTON 



GOVERNMENT PRFNTINQ OFFICE 



ISIS 



