title: Dissipation rates and residues of fungicide azoxystrobin in ginseng and soil at two different cultivated regions in China.
abstract: The maximum residue limit (MRL) for fungicide azoxystrobin in ginseng has not yet been established in China. This is partially due to the lack of its dissipation and residue data at China's main ginseng production areas. In this work, the dissipation rates and residue levels of azoxystrobin in ginseng roots, plant parts (stems and leaves), and soil in Beijing and Jilin Province, China were determined using gas chromatograph-mass spectrometry (GC-MS). The mean half-life of azoxystrobin in ginseng plant parts was 1.6 days with a dissipation rate of 90 % over 21 days. The mean half-life in soil was 2.8 days with a dissipation rate of 90 % over 30 days. Dissipation rates from two geographically separated experimental fields differed, suggesting that these were affected by local soil characteristics and climate. Maximum final residues of azoxystrobin in ginseng roots, plant parts, and soil were determined to be 0.343, 9.40, and 0.726 mg kg(-1), respectively. Our results, particularly the high residues of azoxystrobin observed in ginseng plant parts, provide a quantitative basis for revising the application of this pesticide to ginseng.
authors.affiliation: College of Resources and Environment, Jilin Agricultural University, Changchun, Jilin, 130118, China.
authors.forename: Zhiguang
authors.initials: Z
authors.lastname: Hou
authors.affiliation: Institute of Agricultural Modernization, Jilin Agricultural University, Changchun, Jilin, 130118, China.
authors.forename: Xiumei
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Resources and Environment, Jilin Agricultural University, Changchun, Jilin, 130118, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Zhao
authors.affiliation: College of Resources and Environment, Jilin Agricultural University, Changchun, Jilin, 130118, China.
authors.forename: Xinhong
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Urban and Environmental Sciences, Northeast Normal University, Changchun, Jilin, 130024, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Yuan
authors.affiliation: College of Resources and Environment, Jilin Agricultural University, Changchun, Jilin, 130118, China. luzhongbin@jlau.edu.cn.
authors.forename: Zhongbin
authors.initials: Z
authors.lastname: Lu
mesh_terms: D002681:China; D002980:Climate; D004784:Environmental Monitoring / Q000379:methods*; D005659:Fungicides, Industrial / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006207:Half-Life; D008689:Methacrylates / Q000032:analysis*; D005894:Panax / Q000737:chemistry* / Q000254:growth & development; D010573:Pesticide Residues / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry; D011743:Pyrimidines / Q000032:analysis*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D000073739:Strobilurins
chemical_list: D005659:Fungicides, Industrial; D008689:Methacrylates; D010573:Pesticide Residues; D011743:Pyrimidines; D012987:Soil; D012989:Soil Pollutants; D000073739:Strobilurins; C087670:azoxystrobin
keywords: Azoxystrobin; Dissipation; Gas chromatograph-mass spectrometry; Pesticide residues