通过对水浸处理原木杀虫效果、所产生的有毒气体和水中溶解氧含量变化的测定试验 ,得出了水浸处理原木杀虫机理。即在一定气温条件下 ,水浸处理的原木中有机质不断氧化 ,耗除了水中溶解氧及虫孔中的氧气 ,使害虫窒息死亡 ;同时由于氧化产生了大量的有毒气体 (如H2 S、SO2 、CO等 )渗入虫孔及组织中 ,从而加速了有害生物死亡。结论认为水浸处理原木可以达到检疫杀虫的目的 Through the test of the insecticidal effect of the flooding log, the toxic gas produced and the change of the dissolved oxygen content in the water, the insecticidal mechanism of the flooding log was obtained. Under certain temperature conditions, the organic matter in the flooded log is continuously oxidized, which consumes the dissolved oxygen in the water and the oxygen in the wormhole to cause asphyxiation and death of pests. At the same time, a large amount of toxic gases (such as H2S, SO2, CO, etc.) into the wormhole and tissues, thus accelerating the death of pests. Conclusions that the flooding treatment of logs can achieve the purpose of quarantine insecticide