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本文研究了磷化氢、二氧化碳及低氧、二氧化碳混合熏蒸对腐食酪螨Ｔｙ－ｒｏｐｈａｇｕｓｐｕｔｒｅｓｃｅｎｔｉａｅ（Ｓｃｈｒａｎｋ）成螨的毒杀作用。结果表明：低氧（２％以下），较高浓度ＣＯ＿２（３２％以上）经较长时间（４８小时）的密闭可以杀死９５．５％以上的试螨。在ＰＨ＿３和ＣＯ＿２混合熏蒸中，ＣＯ＿２能增加ＰＨ＿３对该成螨的毒力、其增效系数因ＣＯ＿２浓度和处理时间而异，最高增效系数为６９．８２。在混合熏蒸中，若较长时间的密闭，ＣＯ＿２的最佳增效浓度为４～３２％（容积比），若较短时间的密闭，ＣＯ＿２最佳增效浓度为１６～３２％（容积比）。本文还对ＰＨ＿３、ＣＯ＿２的杀螨作用及ＣＯ＿２对ＰＨ＿３的增效作用进行了讨论。
In this paper, the toxic effects of phosphine, carbon dioxide and hypoxia and carbon dioxide mixed fumigation on adult mite Ty-rophagusputrescentiae (Schrank) were studied. The results showed that more than 95.5% of the test mites could be killed by hypoxia (less than 2%) and higher concentration of CO2 (more than 32%) for a long time (48 hours). In mixed fumigation of PH_3 and CO_2, CO_2 could increase the toxicity of PH_3 to the adult mites. The efficiency coefficient of CO_3 varied with CO_2 concentration and treatment time, and the highest efficiency coefficient was 69.82. In the mixed fumigation, if the closed time is longer, the optimal synergistic concentration of CO 2 is 4 ~ 32% (volume ratio), and if the closed time is shorter, the optimal synergistic concentration of CO 2 is 16 ~ 32% (volume ratio ). In addition, the acaricidal effects of PH 3 and CO 2 and the synergistic effects of CO 2 on PH 3 were also discussed.