在浅圆仓中进行了磷化氢熏蒸试验研究。对实验仓进行密封处理,经测试实验仓压力由500Pa降至250Pa的时间都在60s以上。用两种磷化氢熏蒸方法,借助环流熏蒸装置进行了熏蒸杀虫试验,磷化铝用药量为1.8～3.4g/m3,磷化氢仓外发生器分两次施药。试验结果表明:磷化氢浓度保持100mg/kg以上时间为15d以上,保持70mg/kg以上时间为17d以上,达到了环流熏蒸的技术要求。粮堆内的储粮害虫均被杀死,取得了良好的杀虫效果. Phosphine fumigation experiments were conducted in shallow silos. The sealed test chamber, the test chamber pressure drop from 500Pa 250Pa time in more than 60s. Two kinds of phosphine fumigation methods were used, fumigation insecticide test was carried out by means of circulating fumigation device. The dose of aluminum phosphide was 1.8 ~ 3.4g / m3, and the phosphine external generator was applied twice. The test results show that the technical requirements of circulating fumigation are met when the concentration of phosphine is kept above 100mg / kg for more than 15 days, and the time for 70mg / kg or more is maintained for more than 17 days. Grain stored in the grain pests were killed, and achieved good insecticidal effect.