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UNITED STATES DEPARTMENT OF AGRICULTURE | 
BULLETIN No. 250 - 
Contribution from the Bureau of Entomology 
L. O. HOWARD, Chief 
Washington, D. C. PROFESSIONAL PAPER —sSJInly 24, 1915. 
FOOD PLANTS OF THE GIPSY MOTH 
IN AMERICA - 
By 
; H. MOSHER, Entomological Assistant, Gipsy Moth 
and Brown-Tail Moth Investigations 
CONTENTS 
cee Page 
Scope of the Investigation ..... 1 | Combination-Tray Experiments .. .» 
» Equipment ofthe Laboratory ... . 4 | Classification of Food Plants ... . 
Methods of Conducting Laboratory Ex- The Forest Problem ...-. + » 2 
periments . . . ... 4 | Recommendations for Orchard Practice — 
Difficulties in Conducting the Experi- The City Problem .... +... : 
ments one Index of Food Plants Used in the Exper- 
Food Plants Tested a wa eve vervec & - iments ee 28 @ © © © © © @ 8 
‘ 
2 WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1915 
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