包装大米堆垛硫酰氟熏蒸杀虫效果分析

Analysis of insecticidal effect of sulfuryl fluoride fumigation on packed rice

硫酰氟的穿透力和挥发性较强且不易燃易爆,可较好地杀死对磷化氢有抗性的粮食害虫,目前在粮食仓储行业已被广泛应用。研究通过分堆帐幕熏蒸方式,探究硫酰氟对成品粮包装大米的杀虫效果。结果表明:硫酰氟在扩散22 h后且在散气前质量浓度均维持在20 g/m^(3)以上,能够达到有效的杀虫浓度;熏蒸后对各堆大米内虫样进行筛查,均无活虫;同时对硫酰氟熏蒸后的大米进行残留检测,结果未检出(检出限0.05 mg/kg)。

The penetrating power and volatility of sulfuryl fluoride are strong,and non-flammable and non-explosive,which can better kill the phosphine resistant grain pests,and has been widely used in the grain storage industry.The results showed that the concentration of sulfuryl fluoride was maintained above 20 g/m^(3)after 22 h of diffusion and before dispersion,which could achieve the effective insecticidal concentration.After fumigation,the insect samples in each pile of rice were screened,and there were no live insects.At the same time,sulfuryl fluoride fumigated rice residue detection was conducted,the result was not detected(detection limit 0.05 mg/kg).