CONTROL OF ARGENTINE AXT IX ORANGE GROVES. 



13 



extremely huge ones. The traps are therefore small and a rather 

 large number per acre are used. An average-size mass of ants 

 idlled in one of these traps is illustrated in figure 1. 



CONSTRUCTION AND COST OF TRAPS AND FUMIGATING COVERS. 



The trap (figs. 2 and 3. A) is made of f-inch sap pine and con- 

 sists of the following nine pieces : 



T\vo sides 12 by 12 inches. 



T\v. sides ]() by 12 inches. 



< >ne bottom 10 by 10 inches. 



T\vo top pieces 8 by 12 inches. 



Two pieces triangular molding 12 inches long. 



First the smaller sides and bottom are fastened together, then the 

 larger sides added. Eosined nails or screws should be used in order 

 to prevent separation at the seams and resultant enlargement of the 

 box to a size too great for the fumigation cover. The top pieces are 

 fastened together in the form of a gable with a tight joint, this roof 

 merely resting, loose, upon the top of the box to exclude rain. The 

 pieces of molding are 

 nailed across the in- 

 ner sides of the roof 

 to hold it in place. 



A cover to keep the 

 gas in while fumigat- 

 ing is made of 28- 

 gauge galvanized 

 iron, consisting of one 

 piece 38 by 13 j inches, 

 bent into two right 

 angles, forming two 

 sides and the top. and 

 two pieces 13J by 13^ 

 inches, forming the 

 other two sides. The 

 edges of the latter two 

 pieces are folded over 

 those of the first piece 

 and hammered tightly 

 together. Covers with 

 hammered seams are 

 suitable if very well 

 made, but soldered 

 seams are to be pre- 

 ferred, although they 

 may be slightly more 

 <-.\ pensive. The completed cover (fig. 3, B) should measure 12| by 

 12J inches inside, after a margin of one-fourth inch has been turned 

 down all around the edge to reinforce it. 



FIG. 2. Trap used in destroying the Argentine ant in the 

 Louisiana orange groves. (Note. There should be only 

 a single hole in the bottom to connect with the ant 

 galleries under the trap.) 



