Beynon K I, Wright A N
Bull World Health Organ. 1967;37(1):65-72.
The molluscicide N-tritylmorpholine (Frescon, WL 8008) is likely to be applied to flowing water systems in bilharziasis control programmes. The treated water in irrigation systems will sometimes be applied to growing crops, such as rice, and the nature of the terminal residues of N-tritylmorpholine in rice has therefore been investigated.Crops were grown under greenhouse conditions in soil treated with water containing (14)C-and(3)H-N-tritylmorpholine, using dosage levels very much greater than those that will generally be used in the field. The major radiocomponent in the rice plants was triphenylcarbinol (triphenylmethanol), together with smaller amounts of unchanged N-tritylmorpholine and o-, m-, and p-hydroxytriphenylcarbinol. The hydroxytriphenylcarbinols were present as the free hydroxy compounds and as plant conjugates.Residues of the parent molluscicide and its break-down products are not considered likely to present a toxic hazard to animals or men that eat the crops.
杀螺剂N-三苯甲基吗啉（Frescon，WL 8008）可能会在血吸虫病防治项目中应用于流动水系统。灌溉系统中经过处理的水有时会用于浇灌正在生长的作物，如水稻，因此对水稻中N-三苯甲基吗啉的最终残留性质进行了研究。在温室条件下，将含有¹⁴C和³H-N-三苯甲基吗啉的水施用于土壤中种植作物，使用的剂量水平远高于田间通常使用的剂量。水稻植株中的主要放射性成分是三苯甲醇，还有少量未变化的N-三苯甲基吗啉以及邻、间、对羟基三苯甲醇。羟基三苯甲醇以游离羟基化合物和植物结合物的形式存在。母体杀螺剂及其分解产物的残留不太可能对食用这些作物的动物或人类造成毒性危害。
