The Impact of Pesticides - Academy Publish

Fig. 18 Maximum concentrations of two fungicides in Lake Biwa and river waterand their guideline, NOEC and PNEC valuesIprobenfosIsoprothiolaneConcentration (μg/L)1000010001001010.10.010.01 0.018.01.025001001000Concentration (μg/L)10001001010.10.01ND0.0340101000 1000350All of the iprobenfos and isoprothiolane concentrations were considerably less thanthe guideline values (Fig. 18). Further, all of the iprobenfos and isoprothiolaneconcentrations were considerably less than the NOEC values of algae, waterflea andfish. For the initial risk assessment, all of the iprobenfos and isoprothiolaneconcentrations were considerably less than the PNEC values (1 and 10 μg/L).All concentrations of the esprocarb, molinate, pretilachlor, mefenacet, simetryne andbromobutide were considerably less than the guideline values (Fig. 19). Thepretilachlor concentration was 14 times higher than the NOEC value of algae andthe simetryne concentration was nearly the same as the NOEC value of algae. Allconcentrations of the other four herbicides were considerably less than the NOECvalues of algae. All concentrations of the esprocarb, pretilachlor, mefenacet andsimetryne were considerably less than the NOEC values of waterflea and fish.AcademyPublish.org - The Impact of Pesticides280