Dose-effect study on container fumigation using sulfuryl fluoride for cockroach control

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,P0.0001),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.