CONTROL OF ARGENTINE ANT IN ORANGE GROVES. 



17 



gating siphons. The water can be siphoned over the levee in the 

 high-water stage, but must be forced over with gasoline engine and 

 pump during the low stage. The ants spread very little by flight, but 

 will travel far in the usual trails to nest in the traps, food usually 

 being plentiful in the orange trees near at hand. 



COOPERATIVE AM) COMMERCIAL TRAPPING. 



P>v cooperative trapping, in which all the landowners in a given 

 section club together to purchase traps and insecticide, the ants can 

 be destroyed more thoroughly and rapidly than if each one should 

 undertake the work on his own account. Special crews could be 

 trained to carry on the fumigation efficiently, and the cost of the 



FIG. 4. A bridge which the Argentine ant can not cross. (Newell and Barber.) 



traps and insecticide would be reduced by purchasing in large quan- 

 tity. The trapping method also might be put to use in southern 

 Louisiana by commercial concerns, w T hich could undertake to rid the 

 land of ants at so much per acre. 







USE OF POISONED BAITS 1 AND ANT BARRIERS. 



POISONING THE ANTS. 



Destruction of the Argentine ant by means of poisoned sirups and 

 other baits in orchards where orange trees, weeds, and windbreaks or 



1 For a discussion of the control of the Argentine ant in the household, the reader is 

 referred to Bulletin No. 377 of the United States Department of Agriculture, " The 

 Argentine Ant : Distribution and Control in the United States," 



