The Effect of Heptachlor and Chlordane on the Foraging Activity of Imported Fire Ants

Abstract

Studies have shown that the feeding activity of the imported fire ant, Solenopsis saevissima richteri Forel, on dyed baits is substantially retarded when the foraging area has been treated with granular heptachlor or chlordane. This apparent repellent effect is counteracted partially by the addition of various insecticide solvents or additives such us heavy aromatic naphtha, rosin, lubricating oil, butyl cellusolve, alkylatd polystyrenes, and Piecopale (a petroleum product). There was no apparent difference in feeding-activity in the present of heptachlor or chlordane at dosage rates of 1/16, 1/8, and 1/4 lb/acre and 1/8, 1/4 and 1/2 lb/acre respectively. Repellency was determined by the percentage of ants containing dye after 24 hours of foraging on 1-acre plots treated with bait applied simultaneously with the granular insecticide formulations.