【摘要】 杀虫双是由我国研制并开发的沙蚕毒系农药新品种。为了全面评价它的环境安全性,本文应用放射性同位素示踪技术研究了硫-35标记的杀虫双对农业生态环境的影响。结果表明:³⁵S-杀虫双在土壤中的吸附性甚小,转动性较大,能随水迁移。在土壤和水中比较稳定,降解缓慢,降解物为沙蚕毒素;而它在土壤中的移动性较其母体小。³⁵S-杀虫双被草鱼通过饵料经口和呼吸吸收进入鱼体后,一旦切断“污染源”,可以迅速排至体外;经口进入禽（鸡）、鸟（鹌鹑）体内后,能迅速地随粪便排至体外;在辛醇-水体系中分配系数极小,无生物浓缩现象;以瓷土或粘土为填料的颗粒剂遇水其有效成分的释放是迅速而彻底的。更多还原

【Abstract】 Dimehypo is a nereistoxin derivative, which was developed and manufactured in China.In order to appraise its environmental safety comprehensively, the radioisotopic tracer technique and others were applied to investigate on the effects of 35S-labelled dimehypo (3BS-dimehypo) on agricultural environment and ecosystem.The results revealed its low adsorptivity and high mobility, especially water-carrying mobility in soil, fair stability in soil and water, and slowness in degradation .Its main product of degradation, nereis-toxin, was lower mobility than its material compound in soil. 36S-dimehypo could enter the bodies of grass carps Ctenopharyngodon idellus along with bails or via the respiratory tracts, and be excreted fast after the fish were removed from the contaminated source.Liquid and granulated 3BSimehypo were fed to quail and fowls respectively, and could be also excreted rapidly in excretion and urine.Its much less distribution coefficient in caprylalcoholwater system suggested no accumulation in the adipose tissue of organism.The release of its effective composition in the granules prepared with porcelain clay or clay soil is prompt and complete.更多还原