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Abstract
Field evaluations were conducted to determine efficacy, residual activity, and knockdown potential for fire ant control products. Broadcast granular products (Advion, 0.045% indoxacarb; and Top Choice Insecticide, 0.0143% fipronil) were individually evaluated, and compared with a combination of two products applied together, and with individual mound applications of Maxforce Fire Ant Killer Bait (1.0% hydramethylnon). After application, the greatest percent reduction (90 days) were observed in the Advion/Top Choice combination plots (100.0%), followed by Top Choice alone (96.4%). Advion and MaxForce produced significantly lower foraging reductions at 90 days (61.2% and 27.5% respectively). At the conclusion of the test (day 360), significantly fewer ants were collected in the Advion (777.7), Top Choice (972.8), and combination plots (596.2) than in the control plots (1257.8) ( df 13, F = 8.3, P 0.05). Overall, the efficacy and residual studies suggested that the Advion/Top Choice combination produced both the most rapid reduction in ant foraging and the longest lasting control (90%) at 300 days. When evaluating time to knockdown of foraging populations, the Advion/Top Choice combination also provided the most complete and rapid results by day 7, reducing foraging by 100%. While other products also performed well (75.6 - 95.9% reductions), both the MaxForce and Advion plots had significant increases in foraging at 30-90 days. Overall, foraging knockdown was the most complete in the Avion/Top Choice combination plots at 90 days.
Highlights
Prior to 2009, all reported red imported fire ant (RIFA), Solenopsis invicta Buren, infestations in Virginia were documented and managed by the Virginia Department of Agriculture and Consumer Services (VDACS)
Contrast comparison tests between the mean number of foraging fire ants collected from treatment plots and control plots indicated that the mean number of foragers collected from
The results suggest that the Advion/Top Choice combination, and the Advion treated plots had the greatest reductions in ant foraging by day 3, causing foraging reductions of 82.7 and 79.5 percent respectively
Summary
Prior to 2009, all reported red imported fire ant (RIFA), Solenopsis invicta Buren, infestations in Virginia were documented and managed by the Virginia Department of Agriculture and Consumer Services (VDACS). In 2009 the United States Department of Agriculture (USDA) in conjunction with VDACS implemented the Imported Fire Ant Quarantine in the following areas of Virginia: the counties of James City and York, and the cities of Chesapeake, Hampton, Newport News, Norfolk, Poquoson, Portsmouth, Suffolk, Virginia Beach and Williamsburg. Fire ant control in the quarantined counties/cities is the responsibility of homeowners, nurseryman, and pest management professionals. VDACS is still responsible for managing RIFA infestations in cities outside of the designated quarantine areas. As of 2014, the quarantine has not been expanded and VDACS is still responsible for controlling infestations in the large majority of the state
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