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The Impact of Pesticides - Academy Publish

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SimetrynePretilachlorConcentration (μg/L)100010010ConcentrationShipment amount108642Shipment amount (t)Concentration (μg/L)101ConcentrationShipment amount2015105Shipment amount (t)11988198919901991199219931994199519961997199819992000200120022003200420052006200720082009Year00.11988198919901991199219931994199519961997199819992000200120022003200420052006200720082009Year0Concentration (μg/L)Molinate1001010.1ConcentrationShipment amount302010Shipment amount (t)Concentration (μg/L)Bromobutide10010ConcentrationShipment amount108642Shipment amount (t)0.011988198919901991199219931994199519961997199819992000200120022003200420052006200720082009Year011988198919901991199219931994199519961997199819992000200120022003200420052006200720082009Year0<strong>The</strong> thiobencarb concentrations were 0.09~2.7 μg/L from 1988 to 1995 and ND in2009 in agreement with the shipment tendency. <strong>The</strong> shipment amounts <strong>of</strong> simetryneand molinate have decreased since 1995 and the decreasing tendencies in theirconcentrations have been equal for simetryne but were considerably deviated in2007 for molinate. <strong>The</strong> shipment amount <strong>of</strong> pretilachlor was nearly constant exceptin 1995 and the pretilachlor concentrations were almost constant. For bromobutide,the shipment amount has increased since 2004 but the concentrations have beennearly constant.ECOLOGICAL RISK ASSESSMENT OF PESTICIDES IN WATERFROM LAKE BIWA AND RIVERSInitial risk assessment <strong>of</strong> pesticides in water from Lake Biwa and rivers in 2009Methods<strong>The</strong> concentrations <strong>of</strong> the 11 pesticides (dichlorvos, diazinon, fenitrothion,iprobenfos, isoprothiolane, esprocarb, molinate, pretilachlor, mefenacet, simetryneand bromobutide) in Lake Biwa and river water were evaluated by theirenvironmental water quality guideline values (Table 3) in Japan (Ministry <strong>of</strong> theEnvironment, Japan 2011d; 2011e; 2011f). Further, their concentrations werecompared with their NOEC values in algae, water flea and fish (Ministry <strong>of</strong> theEnvironment, Japan 2011a; US Environmental Protection Agency 2011) asreference data for initial ecological risk assessment and ecological risk assessment<strong>Academy</strong><strong>Publish</strong>.org - <strong>The</strong> <strong>Impact</strong> <strong>of</strong> <strong>Pesticides</strong>278

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