UNITED STATES DEPARTMENT OP AGRICULTURE 
BULLETIN No. 647 
Contribution from the Bureau of Entomology 
L. O. HOWARD, Chief 
Washington, D. C. 
May 3, 1918 
THE ARGENTINE ANT IN RELATION 
TO CITRUS GROVES 
By 
J. R. HORTON, Scientific Assistant, Tropical and 
Subtropical Fruit Insect Investigations 
CONTENTS 
Page 
Introduction 1 
General Belief as to Damage to Orange 
Trees 2 
General Account of Orange Culture in 
Louisiana 4 
Distribution of the Ant in the Orange 
Groves of the United States .... 7 
Feeding Habits of the Ant 8 
Relations with Insects Injurious to Citrus 
Trees 15 
Relations with Insect Enemies of Scales 
and Aphids 48 
Page 
Nests and Protective Structures of the 
Ant 
Cultural Conditions in Ant-Invaded vs. 
Ant-Free Orange Groves In Louisiana 
Demonstration in Improvement of Ant- 
Invaded Groves in Louisiana .... 
Experiments in Controlling the Argen- 
tine Ant 
Summary and Conclusions 
52 
56 
57 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1918 
mm 
