摘要
本文研究了乐果在环境水中消解和淋失的情况。试验结果表明：在稻田水、河塘水、井水中乐果消解的平均半衰期分别为１．３ｄ、２．６ｄ和６．６ｄ，药后２ｄ内，尤其是药后当天遇暴雨，其流失会造成径流污染；渗漏流失大于丁草胺和氰戊菊酯。建议稻田慎用、少用水溶性农药，以减少对自然环境水和地下水的污染。
in this paper, the degradation and loss of dimethoate in environmental waters is studied. The results ofstudy show that the average half - life of degradation in waters of rice fields, rivers and wells is 1.3 days, 2. 6 daysand 6. 6days respectively. In a rainstorm the loss of dimethoate into envirunmental waters within one or two days afterits being applied may cause pollution of water bodies. The leakage and loss of dimethoate is more than that of fen-valerate and butachlor. It is suggested that water - soluble pesticides should be less used in rice fields so as to avoidpollution of environmental waters and groundwater.
关键词
乐果
环境水
消解
流失
渗漏
地下水
Dimethoate, Environmental waters, Degradation
Loss
heakasge
Groundwater
