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目的探索杀灭德国小蠊的方法,为有效控制德国小蠊危害提供科学依据。方法在实验室熏蒸柜中,采用不同浓度硫酰氟对德国小蠊成虫进行熏蒸效果观察研究,运用时间-剂量-死亡率模型对10 h内各处理组德国小蠊成虫累计死亡率随时间、剂量的变化进行拟合。结果硫酰氟熏蒸浓度为1.0、1.5、2.0、2.5和3.0 g/m3熏蒸10 h后,德国小蠊成虫的累计死亡率分别为4%、8%、72%、84%和100%,随着熏蒸时间的延长,硫酰氟半数致死浓度(即LC50)逐渐降低。熏蒸后10 h的LC50和LC90估计值分别为1.95和2.44 g/m3。结论硫酰氟对德国小蠊成虫具有较强的急性毒性。
Objective To explore the method of killing Blattella germanica and provide a scientific basis for the effective control of Blattella germanica. Methods In the laboratory fumigation cabinet, different concentrations of sulfuryl fluoride were used to observe the fumigation effect on adult Blattella germanica. The cumulative mortality of German cockroach in each treatment group within 10 h was calculated with the time-dose-mortality model. Dose changes were fitted. Results The cumulative mortality rates of German cockroach adults were 4%, 8%, 72%, 84% and 100% after fumigation at 1.0, 1.5, 2.0, 2.5 and 3.0 g / With the extension of fumigation time, the lethal concentration of sulfonyl fluoride (LC50) gradually decreased. LC50 and LC90 estimates at 10 h after fumigation were 1.95 and 2.44 g / m3, respectively. Conclusion Sulfuryl fluoride has strong acute toxicity to adult Blattella germanica.