UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 1374 
Washington, D. C. 
Match, 1926 
STUDIES OF THE PINK ROLLWORM IN MEXICO 
W. OHLENDORF, Plant Quarantine Inspector 
Federal Horticultural Board 
CONTENTS 
Page 
Inception and Scope of the Work 1 
Distribution of the Pink Bollworm 2 
Habits 3 
Damage Caused by the Pink Bolrworm 15 
Food Plants 28 
Dissemination by Flight 29, 
Natural Control . . . » 31 
Repression 37 
Summary 64 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1926 
