

UNITED STATES DEPARTMENT OF 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 



Introduction 



General Belief as to Damage to Orange 



Trees 



General Account of Orange Culture in 



Louisiana 



Distribution of the Ant in the Orange 



Groves of the United States .... 



Feeding Habits of the Ant 



Relations with Insects Injurious to Citrus 



Trees 



Relations with Insect Enemies of Scales 



and Aphids 



Page 



15 



48 



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 '. 



60 



Summary and Conclusions 71 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1918 



TmmiTiTi-ia 



