摘要
[Objective] This study aimed to investigate the killing effect of mixed fumi- gation of phosphine and carbon dioxide on eggs of Lasioderma serricorne F. [Method] The outside-storage phosphine generator was placed in a tabernacled smoke box, and the mortality rates of L. serricome F. eggs in the smoke box under conditions of different aluminium phosphide usage amount and different fumigation time were studied. In addition, the times needed by tabernacle and smoke box cen- ter to reach the phosphine concentration peak were recorded. [Result] The optimum conditions for killing the eggs of L. serricorne were as follows： temperature of （27± 2） ℃, relatively humidity of （45±5）%, aluminium phosphide usage amount of 1.5 g/m3 and effective exposure time of 96 h. The killing effect of mixed fumigation of phos- phine and carbon dioxide was increased with the extension of fumigation time. The increased usage amount of aluminium phosphide showed no significant effect on killing effect. The tabernacle space and smoke box center all required relatively short time to reach the phosphine concentration peak. If the tabernacle had a good airtightness, the overall fumigation time could be shortened. [Conclusion] The fumi- gation method is reliable, and it can be used for the control of L. serricorne F. in tobacco storage.
[目的]考察磷化氢-二氧化碳混合熏蒸法测定其对烟草甲虫卵的杀灭效果。[方法]使用仓外磷化氢发生器对帐幕烟箱中的烟草甲虫卵采取磷化氢-二氧化碳混合熏蒸法杀虫,测定不同磷化铝使用量和不同熏蒸时间条件下烟草甲虫卵的死亡率,同时测定帐幕空间和烟箱中心磷化氢浓度达到峰值的时间。[结果]帐幕温度在(27±2)℃,RH(45±5)%时,磷化铝在1.5 g/m^3的使用量下,有效密闭96h,对烟草甲虫卵有较好的杀灭效果。磷化氢-二氧化碳混合熏蒸杀虫效果随熏蒸时间的延长而提高,磷化铝用量的提高对杀虫效果的影响不明显;帐幕空间和烟箱中心磷化氢浓度在较短时间内即达到峰值,在帐幕气密性良好的情况下可缩短整体熏蒸时间。[结论]该法可靠,可用于烟仓中烟草甲虫的防治。
