为严防俄罗斯林木检疫性有害生物随原木传入境内 ,本文以火车装载的俄罗斯进境木材为对象 ,用溴甲烷对原木进行了熏蒸处理试验。在环境温度 1 5℃以上 ,采用了不同的投药剂量和熏蒸时间进行试验。通过熏蒸效果系列检测 ,投药剂量 1 0 0 g/m3、80 g/m3、60 g/m3、50 g/m3、经 1 2h熏蒸 ,对天牛、小蠹、吉丁虫的幼、成虫、叶甲成虫等害虫死亡率为 1 0 0 % ,投药剂量 50g/m3、熏蒸 1 2h为最佳剂量和熏蒸时间。同时对影响熏蒸效果的某些因子也进行了研究 In order to prevent Russian forest quarantine pests from entering the country with logs, this paper takes Russian imported wood loaded by train as the object, and uses the methyl bromide to fumigate the logs. In the ambient temperature above 15 ℃, using a different dosage and fumigation time for testing. Through the fumigation effect series testing, the dosage of 100 g / m3, 80 g / m3, 60 g / m3 and 50 g / m3, The mortality rate of adult pests such as leafhopper was 100%, dosage was 50g / m3, fumigation for 12h was the best dosage and fumigation time. At the same time, some factors that affect the fumigation effect were also studied