Journal of Taiwan Agricultural Research

Author:Yi-Chung Chiu* and Chin-Ling Wang

Abstract:

    Field experiments were conducted at Datan Power Plant, Guanyin, Taoyuan, Taiwan to determine the effectiveness of Fire Fire-Ants Bait (7.5% borax) for control of the red imported fire ant (RIFA, Solenopsis invicta Buren) in Taiwan.  Control effect of Esteem® Ant Bait (0.5% pyriproxyfen) plus Fire Fire-Ants Bait (7.5% borax) or Justice® Fire Ant Bait (0.015% Spinosad) on RIFA were compared.  The entire tested area was sprayed with the pyriproxyfen bait (2 kg/ha).  After four months, the borax bait (3 kg/ha) and spinosad bait (3 kg/ha) were sprayed in each tested area.  Throughout the eight-month experimental period, both treatments of pyriproxyfen plus borax and pyriproxyfen plus spinosad showed effective control of RIFA, and the rates of control were over 97.7% based on the number of active nests.  When RIFA densities were monitored by the pit-fall trap method the rate of control by borax bait was over 70% after two months, and over 83% after three months, whereas the rate of control by spinosad bait was over 79% after three months.  The study shows that the borax bait and spinosad bait have apparent controlling effect on RIFA.

Key words:Red imported fire ant, Solenopsis invicta, Ant bait, Borax

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