Barrier Sprays to Control Argentine Ants (Hymenoptera: Formicidae)

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Abstract:

Insecticide was applied to the perimeter of homes and adjacent areas likely to be visited by Argentine ants, lridomyrmex humilis (Mayr). Treatment configuration consisted of a 1.8- to 2.4-m-wide band of spray around the exterior of the structure. Margins of sidewalks and pathways and around stepping stones, bases of trees, potted plants, and garbage cans were sprayed with 1.2-to 1.8-m-wide bands. Based on monitoring with traps, significant and relevant control was achieved when the number of ants trapped post treatment declined at least 80%. Barrier sprays of 237 mg (AI)/m2 chlorpyrifos, 14.5 mg (AI)/m2 cyfluthrin and 67.2 mg (AI)/ m2 cypermethrin provided >80% reductions in the number of ants trapped at 7 d. Chlorpyrifos provided >82% reductions for at least 30 d. The combination of cyfluthrin spray + granules provided >85% reductions in ant trap counts at day 7. Only the combination treatment provided >80% reductions at 60 d. Cypermethrin and permethrin sprays failed to provide >80% reductions for 30 d. Factors that likely contribute to decreased performance of barrier sprays against ants include heavy irrigation, dense ground cover, exposure to direct sunlight, alkaline nature of the stucco and concrete surfaces, and extremely high temperatures.

Document Type: Research Article

Publication date: February 1, 1996

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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