2003 年 49 巻 4 号 p. 249-259
The ecologic risk assessments consisting of hazard and exposure analysis are of prime importance for pesticide registration. In particular, the U.S.A.'s assessment on aquatic environment using simulation model is well organized. We introduce the current methods and ECOFRAM (Ecological Committee on FIFRA Risk Assessment Methods) by describing the case of pyrethroid insecticide as an example.