The Impact of Pesticides - Academy Publish

Fig. 15 Variations in shipment amounts of two fungicides in Shiga Prefecture andtheir yearly maximum concentrations in Yanamune River waterConcentration (μg/L)1010.10.01Iprobenfos1988198919901991199219931994199519961997199819992000200120022003200420052006200720082009YearConcentrationShipment amountND1086420Shipment amount (t)Concentration (μg/L)Isoprothiolane1010.10.011988198919901991199219931994199519961997199819992000200120022003200420052006200720082009YearConcentrationShipment amount20151050Shipment amount (t)Similarly, variations in the concentrations of the two fungicides (iprobenfos andisoprothiolane) in Yanamune River were compared with those in their shipmentamounts (Fig. 15). Iprobenfos and isoprothiolane showed decreasing tendency inboth of the concentrations and the shipment amounts from 1988 to 2007 foriprobenfos and from 1992 to 2007 for isoprothiolane, respectively.Variations in shipment amounts of six herbicides in Shiga Prefecture and theiryearly maximum concentrations in Yanamune River water are shown in Fig. 16. ForCNP, the use in Japan was inhibited in 1994 and the shipment amount has beenreported to be 0 t since 1994. The CNP concentrations were 1.7 μg/L in 1989, 0.1μg/L in 1994, ND in 1995, 1996, 2007 and 2009. The decreasing tendency in theCNP concentrations was Prefecture was 11.7 t in 2006 but decreased to 3.7 t in 2007and 0 t in 2008 owing to self-control of the use in Shiga Prefecture equal to that inthe shipment amount. For thiobencarb, the shipment amount in Shiga.Fig. 16 Variations in shipment amounts of six herbicides in Shiga Prefecture andtheir yearly maximum concentrations in Yanamune River waterConcentration (μg/L)1010.10.01CNPND ND1988198919901991199219931994199519961997199819992000200120022003200420052006200720082009YearConcentrationShipment amountNDND403020100Shipment amount (t)Concentration (μg/L)1010.10.01Thiobencarb1988198919901991199219931994199519961997199819992000200120022003200420052006200720082009YearConcentrationShipment amountND20151050Shipment amount (t)AcademyPublish.org - The Impact of Pesticides277