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比较测定了磷化氢对嗜卷书虱Liposcelis bostrychophila(Pearman)、嗜虫书虱L.entomophila(Enderlein)和小眼书虱L.paeta(Pearman)等3种储粮书虱的毒力,并研究了在室温条件下磷化氢浓度分别为100、200、300、400和500mL/m3的完全致死时间。结果表明:磷化氢对嗜卷书虱、小眼书虱和嗜虫书虱的LD50值(95%置信限)分别为0.0039(0.0038～0.0042)、0.0804(0.0750～0.0887)和0.0815(0.0815～0.0892)mg/L,嗜虫书虱对磷化氢的耐受力比嗜卷书虱高20多倍。在试验浓度下第7d可全部致死嗜卷书虱,100mL/m3的浓度完全致死小眼书虱和嗜虫书虱则需22d多;200mL/m3完全致死小眼书虱和嗜虫书虱的时间约为19d,300mL/m3浓度完全致死小眼书虱和嗜虫书虱的时间在13d和16d,400mL/m3及以上浓度完全致死小眼书虱在7d以内,完全致死嗜虫书虱仍需13d。500mL/m3的浓度完全致死嗜虫书虱仅缩短到10d。采用磷化氢熏蒸书虱在100～500mL/m3的浓度范围内,提高浓度可以使完全致死书虱的时间明显缩短。
The toxicity of phosphine to three species of stored ticks, Liposcelis bostrychophila (Pearman), L. entomophila (Enderlein) and L. paraeta (Pearman) The complete lethal time was studied for phosphine concentrations of 100, 200, 300, 400 and 500 mL / m3 at room temperature respectively. The results showed that the LD50 values (95% confidence limits) of phosphine to Bemisia tabaci, Bemisia tabaci and Beetles were 0.0039 (0.0038 ~ 0.0042), 0.0804 (0.0750 ~ 0.0887) and 0.0815 (0.0815 ~ 0.0892) mg / L, flies lice resistance to phosphine more than 20 times higher than ticks lice. At the test concentration, it could kill all the ticks on the 7th day, and the total lethal dose of 100mL / m3 was about 22d when the concentration was 100mL / m3. The total lethal dose of 200mL / Time is about 19d, the concentration of 300mL / m3 completely lethal small lice and insects tick louse time at 13d and 16d, 400mL / m3 and above the concentration of complete lethal small lice lice in less than 7d, completely lethal louse Need 13d. 500mL / m3 concentration of lethal lice completely dead only shortened to 10d. Phosphoric acid fumigation book lice in the concentration range of 100 ~ 500mL / m3, increasing the concentration can make the time completely lethal tick lice significantly shortened.