Fig. 2 Ant community dynamics data in the Argentine ant control area of Ota Ward based on the capture numbers from sticky traps (one year in 2010). (a) Jonan-jima area: no insecticide was applied in Block I as a control, but was applied in the other blocks, II and III. (b)Tokai area: insecticide was applied in all three blocks, I, II and III. Compared to the untreated area, the number of the Argentine ants captured in the treated areas decreased, while the numbers of native ant species captured increased (excerpted from Inoue et al., 2015). K. GOKA high efficacy of over 99 percent. This suggests that the control effect of fipronil bait and liquid formulations is significant (Fig. 2) (Inoue et al., 2015). As a result of three years of pest control, the numbers of Argentine ants captured continued to decline, ultimately reaching zero captures in 2013. 3.2 World’s First Scientifically Based Eradication Declaration After three years of control efforts in Ota Ward, Argentine ants, once considered established in the area, were no longer detected (Fig. 3). However, due to the nature of monitoring with traps, the possibility remains Based on capture data from the sticky traps during the first year of control, we determined the control efficiency of the insecticide by calculating how much the rate of increase in activity from spring to summer in the treated areas was suppressed relative to the untreated area. The results revealed that all treatment areas exhibited a 120 surrounded by roads was designated as an untreated area, where no pesticide treatment was applied. This setting allowed for a comparison of ant community dynamics between the untreated block and pesticide-treated blocks to assess the efficacy of the bait treatment. From the second year onward, the pesticide treatment continued, including in the initially untreated area.
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