UNITED STATES DEPARTMENT OF AGRICULTURE 



S^Jvr^jiu 



ULLETIN No. 252 Vi 



Contribution from the Bureau of Entomology 

 L. O. HOWARD, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



August 10, 1915 



LIFE HISTORY OF THE CODLING MOTH IN MAINE. 



By E. H. Siegler and F. L. Simanton, Entomological Assistants, Deciduous Fruit 



Insect Investigations. 



CONTENTS. 



Page. 



Introduction 1 



Definition of terms 2 



Seasonal-history studies of 1913 3 



Seasonal-history studies of 1914 28 



Comparison of the life history of the codling 



moth in 1913 and 1914 46 



The control of the codling moth in Maine 49 



Summary and conclusions 49 



INTRODUCTION. 



A temporary field station of the United States Bureau of Entomol- 

 ogy was established at Winthrop, Me., in the spring of 1913, under 

 the direction of Mr. A. L. Quaintance, in charge of deciduous fruit 

 insect investigations. Mr. E. H. Siegler, of the Bureau of Ento- 

 mology, was assigned to this station for the purpose of studying the 

 life history of the codling moth (C'arpocapsa pomonella L.) under 

 Maine conditions. Owing to the transfer of Mr. Siegler in 1914 to 

 another station, Mr. F. L. Simanton was detailed to complete the 

 investigations. The records of the observations, herewith reported, 

 cover the seasons of 1913 and 1914, during part of which time the 

 writers were assisted by Mr. E. R. Van Leeuwen. 



In order to ascertain the variations in the life history of the codling 

 moth under diverse climatic conditions, investigations have now 

 been completed in widely separated districts, such as Maine and New 

 Mexico, as well as in representative intermediate localities. The 

 methods of study have been essentially the same wherever the work 

 has been undertaken. In this bulletin a detailed account of the life 

 history of the codling moth is reported as well as brief mention of the 

 means of control. 



93036°— Bull. 252—15 1 



