Abstract:

Objective　The  optimal  dose?duration  relationship  of  a  broad?spectrum  fumigant?sulfuryl  fluoride, was analyzed in this study. Methods　Each group of Blattella germanica was fumigated to reach static inhalation of the agent through the respiratory tract. Poisoning symptoms and death counts were observed, and a quadratic response surface regression model was established to fit and predict the experimental data, which were then verified under simulated scenes. Results　The analysis of variance showed statistical significance of the response surface model (F＝75.12, P＜0.0001), the total coefficient of determination R²＝0.7848. The simple, quadratic and cross terms of the model were all statistically significant, their coefficients of determination being 0.1493, 0.1902 and 0.4453, respectively. The on?site simulation experiment demonstrated a 100% cockroach kill rate based on the dose and fumigation duration predicted by the model using sulfuryl fluoride. Conclusion　The optimal dose?duration of sulfuryl fluoride fumigation for cockroach control was basically identified through this study, providing the basis for determination of proper dose and duration in the future container fumigation.

Key words: Sulfuryl fluoride, Fumigation, Blattella germanica, Response surface regression model, On?site experiment

摘要：

目的　研究广谱熏蒸剂——硫酰氟熏蒸灭蟑的最佳剂量与时间的关系。方法　采用静式呼吸道吸入染毒法对各组德国小蠊进行熏蒸处理，观察其中毒症状与死亡情况，运用二次响应面回归模型对实验数据进行拟合及预测，并经过现场模拟验证。结果　模型方差分析结果显示，响应面模型有统计学意义（F＝75.12，P＜0.0001），总决定系数R2＝0.7848，模型的一次项、二次项与交叉项均有统计学意义，其决定系数分别为0.1493、0.1902和0.4453；以该模型预测所得的硫酰氟灭蟑剂量与作用时间值为依据进行现场模拟试验，灭蟑率均达到100％。结论　根据本次研究基本确定了硫酰氟熏蒸灭蟑的最佳剂量与作用时间的关系，为今后集装箱熏蒸工作中设定正确的投药量与时间提供了科学依据。

关键词: 硫酰氟, 熏蒸, 德国小蠊, 响应面回归模型, 现场试验