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Acute toxicity of fipronil to an invasive ant,Lepisiota frauenfeldi
Authors:Daisuke Hayasaka  Masayoshi K. Hiraiwa  Yu Maebara  Yugo Seko
Affiliation:1.Faculty of Agriculture, Kindai University;2.Graduate School of Agriculture, Kindai University
Abstract:
Slow-acting fipronil is one of the best components for controlling invasive ants. However, its efficacy against invasive Lepisiota frauenfeldi, which recently invaded Japan, remains unclear. Here, its acute toxicity to Le. frauenfeldi was assessed, and its lethal concentrations were compared with those against other invasive ants (Linepithema humile and Solenopsis invicta). The LC10 and LC50 values of fipronil for Le. frauenfeldi were significantly lower than the previously reported values for Li. humile and/or S. invicta, and its LC90 value against Le. frauenfeldi was in the same range as that required for Li. humile extermination. Additionally, Le. frauenfeldi can be more sensitive to fipronil than non-target arthropods. Therefore, recent fipronil-based Li. humile and S. invicta eradication/control programs may be effective against Le. frauenfeldi as well. Moreover, applying fipronil at dosages appropriate for Le. frauenfeldi would lead to effective Le. frauenfeldi extermination/control with low damage to other native species/ants.
Keywords:browsing ant   chemical control   eradication/extermination   invasive alien ants   slow-acting chemicals   toxic bait
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