克蚁星粉剂对黄胸散白蚁的毒效

目的 了解3％克蚁星粉剂对黄胸散白蚁的毒杀效果，为开发替代灭蚁灵的白蚁灭治药物提供理论依据。方法 (1)胃毒毒性。将克蚁星粉剂按一定比例拌在松木粉中，让白蚁工蚁取食，观察试虫中毒、死亡情况；(2)传递毒性。将克蚁星粉剂粘在一定比例个体的白蚁身上，观察整个种群白蚁的存活情况。结果 克蚁星粉剂对黄胸散白蚁具有较高的胃毒毒性。供试个体取食毒饵10d，致死中浓度为56．1mg／L。克蚁星毒性能在黄胸散白蚁群体间较好地被传递，处理1％～9％的个体可使先后接触的4～9批个体死亡。结论 克蚁星粉剂可替代灭蚁灵用于白蚁防治。

Toxicity of Keyixing Powder to Reticulitermes speratus

Objective To know the toxic effects of 3% Keyixing powder against Reticulitermes speratus so as to provide the theoretical basis for developing alternative termiticides of Mirex. Methods (1)Oral toxicity. Keyixing powder was mixed with pine wood powder as the demanded ratio, then put into petri dish padded moistened sands and with 50 workers of Reticulitermes speratus . The mortality of tested termites was recorded every 24 h. (2) Transferring toxicity. Termite population with the different ratios individuals treated by 3% Keyixing powder was reared in laboratory, and their survival time were recorded. Results Keyixing powder had higher stomach toxicity against Reticulitermes speratus . The LC 50 was 56.1 mg/L at 10 d after treatment. Meanwhile, the chemical of Keyixing could be transferred by termite individuals in tested population. When 1 to 9 percent of individuals were treated by Keyixing powder, these treated individuals could cause 400 to 900 individuals death. Conclusion Keyixing powder could be used as the alternative of Mirex for termite control.