应用联杯法等室内测定了0.05%氟虫腈杀蚁饵剂对红火蚁的引诱力、毒杀速度及其传导毒杀活性.结果表明,供试饵剂对红火蚁的引诱性、毒杀速度显著优于正舒(对照药剂).红火蚁觅食到供试饵剂的初始时间为2.00 min,与正舒的2.33 min达显著差异；供试饵剂处理后24 h的工蚁死亡率为80.65%,显著高于对照饵剂的50.15%；72 h的工蚁死亡率即达到100%.联杯法测定结果表明,0.05%氟虫腈杀蚁饵剂能通过工蚁的取食和交哺行为进行传导.供试饵剂受药杯中工蚁、幼蚁和蚁后3 d后死亡率均达到100%,显著高于对照饵剂.0.05%氟虫腈杀蚁饵剂引诱性强、对红火蚁具有高胃毒、高传导毒杀活性,可适用于防控入侵红火蚁.% The attractive effect, poison speed and transferring insecticidal activity of bio-insecticide Fipronil to the worker ants of the red imported fire ant (Solenopsis invicta Buren) in a laboratory reared colony were measured with the co-cup method. The results showed that the attractive effect and poison speed of the oral toxicity of Fipronil was significantly higher than that of Zheng-shu(CK). The initial time of ants foraging in the test was 2.0 min, which was remarkably lower than 2.33 min in the use of Zheng-shu. As to the transferring insecticide activity, the co-cup method was used, and the results showed that Fipronil in bait was able to be transferred by the feeding worker ants to the worker and larval ants. The mortality caused by transferring insecticide was increased with the increase in active time in bait. The mortality of transferring insecticide was 100%after 3 d treatment, and the mortality of the queens and larvae was up to 100%, too. It could be concluded that Fipronil in bait had a good oral toxicity, and exhibited a remarkable transferring insecticidal activity, and therefore Fipronil was one of suitable insecticides for bait preparation.
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