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在25±1℃,75±2%RH条件下,利用连续通气熏蒸设备测定了无色书虱(Liposcelis decolor)敏感品系YNQJLdl和抗性品系GXHZLdl在不同恒定磷化氢(PH3)浓度下的种群灭绝时间(TPE)。在1000、700、400、200和100(m L/m3)的PH3浓度下,抗性品系GXH ZLdl的TPE分别为3d、5d、7d、11d、13d;敏感品系YNQJLdl的TPE分别为1d、1d、1d、2d、3d。YNQJLdl和G X H ZLdl在100m L/m 3￣1000m L/m 3(0.14m g/L￣1.39m/L)的PH 3浓度范围内,种群灭绝时间TPE与PH 3浓度C之间的关系符合C n.T=k规律。YNQJLdl的关系式为C 0.80.T=15.73m g.h/L,GXHZLdl的关系式为C 0.61.T=106.7mg.h/L。种群灭绝试验模拟了实际熏蒸情况,更能代表抗性品系对PH 3的抗性程度,为实仓PH3熏蒸提供了可靠的参考依据。
The population of the susceptible strain YNQJLdl and the resistant strain GXHZLdl at different concentrations of phosphine (PH3) were measured at 25 ± 1 ℃ and 75 ± 2% RH using continuous ventilation fumigation equipment. Extinction time (TPE). The TPE of the resistant strain GXH ZLdl was 3d, 5d, 7d, 11d and 13d at 1000, 700, 400, 200 and 100 (m L / m3) respectively. The TPE of the susceptible strain YNQJLdl was 1d, , 1d, 2d, 3d. The relationship between population extinction time TPE and PH 3 concentration C in the range of 100 m L / m 3 ~1000 m L / m 3 (0.14 mg / L ~ 1.39 m / L) of YNQJLdl and GXH ZLdl was in accordance with C nT = k law. YNQJLdl has the relationship of C 0.80.T = 15.73 m g.h / L and GXHZLdl has the relationship C 0.61.T = 106.7 mg.h / L. The population extinction test simulates the actual fumigation situation, which can better represent the resistance level of the resistant strain to PH 3, which provides a reliable reference for the fumigation of PH3 in real silo.