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1 December 2004 Effect of Delayed Toxicity of Chemical Barriers to Control Argentine Ants (Hymenoptera: Formicidae)
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Abstract

Brief exposures of Argentine ants to four different insecticide treatments, bifenthrin, β-cyfluthrin, bifenthrin β-cyfluthrin, and fipronil, were conducted to determine Kaplan–Meier product limit survivorship percentiles (SPs) at 21–23 and 27–29°C. Bifenthrin, β-cyfluthrin, and bifenthrin β-cyfluthrin provided rapid kill at 21–23°C with SP10 values ranging from 11.2 to 33.7 min. Fipronil provided delayed toxicity at 21–23°C with SP10 values ranging from 270 to 960 min. At 27–29°C, all of the SP10 values significantly decreased. Field tests in which Argentine ants were induced to forage across insecticide-treated surfaces were used to determine the effect that speed of action has on foraging and recruitment ability, and whether these insecticides are repellent. The slower-acting fipronil allowed a greater amount of foraging and consequently a greater fraction of the colony to be exposed, whereas fast-acting bifenthrin, β-cyfluthrin, and bifenthrin β-cyfluthrin inhibited recruitment, resulting in fewer ants being exposed and killed. Implications for controlling ants by using perimeter barrier treatments are discussed.

Andrew M. Soeprono and Michael K. Rust "Effect of Delayed Toxicity of Chemical Barriers to Control Argentine Ants (Hymenoptera: Formicidae)," Journal of Economic Entomology 97(6), 2021-2028, (1 December 2004). https://doi.org/10.1603/0022-0493-97.6.2021
Received: 29 April 2004; Accepted: 1 September 2004; Published: 1 December 2004
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