在我国南方稻区普遍使用三环唑防治水稻稻瘟病，采用推荐剂量对养鱼稻田喷雾后，其在中稻、鱼和水体中呈指数型消解模式，半衰期（Ｔ１／２）分别为８．６２、２．９７和３．７０天。在水稻生长期施用２次，后一次施药距收期为３０天时，稻米、鱼肉中残留均低于糙米的最大残留值（ＭＲＬ值），施用是安全的 Tricyclazole was widely used to control rice blast in the southern rice area of ​​China. After spraying the rice paddy with the recommended dose, it showed exponential digestion pattern in mid-rice, fish and water with the half-life (T1 / 2) of 8.62 , 2.97 and 3.70 days. In the rice growth period of two applications, the latter application from the 30 days, rice, fish residues were lower than the maximum residual value of brown rice (MRL value), the application is safe