Performance of fipronil and imidacloprid as the attracticide against Odontotermes formosanus

The toxicity results showed that 0.025～0.4 μg/mL fipronil and imidacloprid achieved obvious insecticidal efficacy after Odontotermes formosanus was treated for 3 d and 5 d respectively.LC-(50) of fipronil and imidacloprid for 1d after treatment were 509 times and 63.8 times as that for 5 d after treatment respectively,indicating that the efficacy of the two pesticides against (O.formosanus) was slow.Further experiments revealed that the lethal toxicity of fipronil and imidacloprid could be transferred to the recipient termites when the donor termites were exposed to 0.5 μg/g poisonous sand for 1 h.The repellent tests showed that 50 μg/mL fipronil had no obvious repellent effect against (O.formosanus,) but 50 μg/mL imidacloprid had obvious repellent effect.Fipronil is a better termite attracticide in the two pesticides tested.