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1 October 2014 Argentine Worker Ant (Hymenoptera: Formicidae) Mortality Response to Sodium Salicylate and Sodium Cinnamate
Megan E. Babb, ChulHee Kang, Mark A. Brinkman, Cathy Lee
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The mortality response of Argentine worker ants, Linepithema humile (Mayr), following exposure to four phenolic compounds (sodium salicylate, sodium cinnamate, p-coumaric acid, caffeic acid) known to serve in plant defense mechanisms, boric acid, and sodium bicarbonate was assayed in laboratory testing. Argentine ant mortality after 3 days of exposure to sodium salicylate powder was significantly (F = 129.69; df = 3,2; P < 0.0001) higher than ant mortality in the untreated controls and in treatments with boric acid and sodium bicarbonate powders. Worker ant mortality after 3 days exposure to either sodium salicylate or cinnamic acid powder was significantly (F = 124.56, df =4,2, P < 0.0001) higher than mortality of worker ants in control, p-coumaric acid, and caffeic acid treatments. Assays with a range of concentrations (0,0.625, 1.25, 2.5, and 5.0%) of either sodium salicylate or sodium cinnamate dissolved in 10% sucrose solution showed significantly higher mortality with 5% sodium salicylate (F = 15.03; df = 4,2; P < 0.0001) and 5% sodium cinnamate (F = 30.14; df = 4,2; P < 0.0001) than the lower concentrations tested. In summary, salicylic acid and cinnamic acid, both in powder forms and liquid sucrose baits caused a higher Argentine worker ant mortality than either boric acid or sodium bicarbonate. Both appear to be promising candidates for further development as Argentine ant control products.

Megan E. Babb, ChulHee Kang, Mark A. Brinkman, and Cathy Lee "Argentine Worker Ant (Hymenoptera: Formicidae) Mortality Response to Sodium Salicylate and Sodium Cinnamate," Journal of Entomological Science 49(4), 342-351, (1 October 2014).
Received: 14 November 2013; Accepted: 1 May 2014; Published: 1 October 2014

Argentine ant
boric acid
phenolic compounds
plant defensins
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