UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 250 



Contribution from the Bureau of Entomology 

 L. O. HOWARD, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



Jnly 24, 1915. 



FOOD PLANTS OF THE GIPSY MOTH 

 IN AMERICA 



By 



F. H. MOSHER, Entomological Assistant, Gipsy Moth 

 and Brown-Tail Moth Investigations 



CONTENTS 



Scope of the Investigation 1 



Equipment of the Laboratory .... 4 

 Methods of Conducting Laboratory Ex- 

 periments 4 



Difficulties in Conducting the Experi- 

 ments 5 



Food Plants Tested 5 



Page 



Combination-Tray Experiments ... 27 



Classification of Food Plants .... 33 



The Forest Problem 35 



Recommendations for Orchard Practice 35 



The City Problem 36 



Index of Food Plants Used in the Exper- 

 iments .... 36 



WASHINGTON 



GOVERNMENT PRINTING OFFICE! 



1915 



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