Chapman R A, Harris C R
J Environ Sci Health B. 1982;17(4):355-61. doi: 10.1080/03601238209372326.
Isofenphos (Amaze (R), Oftanol (R), BAY 92114, 1-methylethyl 2- [[ethoxy [(1-methylethyl)amino] phosphinothioyl] oxy] benzoate) (20% granular) and isazophos (Miral (R), CGA 12223, 0,0-diethyl 0- [1-isopropyl-5-chloro-1,2,4-triazolyl(3)] phosphorothioate) (50% emulsifiable concentrate) were applied at 3.4 Kg AI/ha and incorporated into sand and muck soil contained in small field plots. Soil samples were taken at intervals, extending over 2 yr in the case of isofenphos. Radishes and carrots served as indicator crops for absorption of insecticides. Soil and crop samples were extracted and analyzed for the insecticides by glc. Isazophos residues in soil declined rapidly with ca. 50% of the initial applications remaining after 2 and 5 wk in the sand and muck respectively, and less than 1 and 3% after 1 yr. Isofenphos residues declined slowly with ca. 50% of the initial application remaining at 12 wk in both soil types. Residues of isofenphos after 1 yr were 15 and 45% of the initial application to sand and muck, respectively, and after 2 yr they had declined to 4 and 14%, respectively. Residues of both materials in radishes and carrots generally did not exceed 0.04 ppm except for carrots grown the first yr in isofenphos treated sand, where 0.25 ppm was found.
异柳磷（商品名Amaze、Oftanol、BAY 92114，化学名：2-[[乙氧基[(1-甲基乙基)氨基]硫代磷酰基]氧基]苯甲酸1-甲基乙酯）（20%颗粒剂）和异唑磷（商品名Miral、CGA 12223，化学名：O,O-二乙基-O-[1-异丙基-5-氯-1,2,4-三唑-3-基]硫代磷酸酯）（50%乳油）以3.4千克有效成分/公顷的用量施用于小型田间试验地的砂土和腐殖土中，并翻入土中。每隔一段时间采集土壤样品，异柳磷的采样时间跨度为2年。萝卜和胡萝卜用作指示作物，以监测杀虫剂的吸收情况。土壤和作物样品经提取后，用气相色谱法分析其中的杀虫剂。异唑磷在土壤中的残留量迅速下降，在砂土和腐殖土中，分别在施药2周和5周后，残留量约为初始用量的50%，1年后分别降至1%以下和3%以下。异柳磷残留量下降缓慢，在两种土壤类型中，施药12周后残留量约为初始用量的50%。异柳磷在砂土和腐殖土中施药1年后的残留量分别为初始用量的15%和45%，2年后分别降至4%和14%。除了第一年在异柳磷处理过的砂土中种植的胡萝卜中发现残留量为0.25 ppm外，萝卜和胡萝卜中两种药剂的残留量一般不超过0.04 ppm。
