![]() However, liquid bait use has been limited owing to the lack of bait dispensers that are effective, inexpensive, and easy to service. Liquid baits are highly attractive to pest ants because they mimic natural food sources such as honeydew and nectar, the principal dietary components of many ants. ![]() Polyacrylamide hydrogels: an effective tool for delivering liquid baits to pest ants (Hymenoptera: Formicidae).īuczkowski, Grzegorz Roper, Elray Chin, DarrenĪnt management in urban and natural areas often relies on toxic baits. It excluded all insects except ants, required only milligram quantities of toxicant, and eliminated the problem of formulating toxicants into aqueous sugar baits. The virtual bait station exploits the foraging behavior of the ants and provides a low impact approach to control ants in environmentally sensitive habitats. Further modification of the bait station design minimized the accumulation of dead ants in the sucrose solution, significantly improving the longevity and efficacy of the bait station. The delayed toxicity of fipronil deposits allowed the ants to continue foraging on the sucrose solution and to interact with their nestmates, killing them within 3-5 d after exposure. Foraging ants crossed the treated surface to consume the sucrose solution. The pipe was provisioned with an inverted bottle of 25% sucrose solution, then capped, and buried in the sand. The bait station consisted of a polyvinyl chloride pipe that was treated on the inside with fipronil insecticide at low concentrations to obtain delayed toxicity against ants. Conventional pest control strategies are prohibited because of the existence of the protected bird species and the site's proximity to the ocean. The beach is heavily infested with Argentine ants, one of the threats for the California least tern chicks. White Beach is a nesting habitat for an endangered seabird, the California least tern (Sterna antillarum browni Mearns). Our data indicate that of these four baits, Xstinguish and Exterm-an- Ant are the best options for control of Argentine ants in New Zealand.ĭevelopment of virtual bait stations to control Argentine ants (Hymenoptera: Formicidae) in environmentally sensitive habitats.Ĭhoe, Dong-Hwan Vetter, Richard S Rust, Michael KĪ novel bait station referred to as a virtual bait station was developed and tested against field populations of the invasive Argentine ant, Linepithema humile (Mayr) (Hymenoptera: Formicidae), at White Beach, Camp Pendleton, in Oceanside, CA. Our results suggest queen mortality must be assessed in tests for toxic bait efficacy. The baits Advion ant gel and Advion ant bait arena were not effective against Argentine ants in these trials, resulting in ants are likely to be starved. In contrast, 100% queen and worker mortality was observed in colonies starved for 48 h and given Xstinguish or Exterm-an- Ant. After 24-h starvation three of the baits did not result in any queen deaths, with only Exterm-an- Ant producing an average of 25% mortality. In no treatment with 24-h starvation did we observe 100% worker death. ![]() The efficacy of the toxic baits was strongly influenced by starvation. Experimental nests contained 300 workers and 10 queen ants that were starved for either 24 or 48 h before toxic bait exposure. These baits were Xstinguish that has the toxicant fipronil, Exterm-an- Ant that contains both boric acid and sodium borate, and Advion ant gel and Advion ant bait arena that both have indoxacarb. ![]() We studied the efficacy of four toxic baits to the Argentine ant, Linepithema humile (Mayr) (Hymenoptera: Formicidae). The efficacy of toxic baits should be judged by their ability to kill entire ant colonies, including the colony queen or queens. Mathieson, Melissa Toft, Richard Lester, Philip J Influence of toxic bait type and starvation on worker and queen mortality in laboratory colonies of Argentine ant (Hymenoptera: Formicidae). ![]()
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