| 嘧菌酯在大豆中的沉积、降解规律及最低有效防控剂量研究 |
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| 引用本文： | 童舟,孙明娜,褚玥,胡东强,董旭,王梅,高同春,段劲生.嘧菌酯在大豆中的沉积、降解规律及最低有效防控剂量研究[J].农药学学报,2021,23(3):597-602. |
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| 作者姓名： | 童舟 孙明娜 褚玥 胡东强 董旭 王梅 高同春 段劲生 |
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| 作者单位： | 安徽省农业科学院 植物保护与农产品质量安全研究所/农业农村部农产品质量安全风险评估实验室 (合肥)，合肥 230031 |
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| 基金项目： | 国家重点研发计划 (2016YFD0200207)；国家自然科学基金 (32072465，32001949) |
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| 摘 要： | 嘧菌酯是防治大豆锈病的重要杀菌剂，明确嘧菌酯在大豆上的残留规律是一项亟待开展的课题。本研究采用超高效液相色谱-串联质谱 (UPLC-MS/MS) 技术，建立了大豆种植体系中茎、叶、籽粒及土壤中嘧菌酯的残留分析方法，定量限达0.005 mg/kg。在田间试验点基础上，明确了安徽、山东和吉林3个试验点嘧菌酯在大豆上的沉积与降解规律，发现250 g/L嘧菌酯悬浮剂在施用后主要沉积在大豆叶片中，沉积量由北向南呈逐渐降低趋势，嘧菌酯在上部茎叶中降解速率较快，地区间无明显差异；比较了不同剂量嘧菌酯与大豆锈病防效之间的关系，同时给出了残留量，得到了嘧菌酯的最低有效防控剂量为225 g/hm2。本研究成果对指导嘧菌酯在大豆生产中的科学使用以及对大豆上农药减量实践具有重要意义。
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| 关 键 词： | 嘧菌酯 大豆 沉积规律 降解规律 最低有效防控剂量 农药减量 |
| 收稿时间： | 2021-01-07 |
Study on the deposition,degradation and minimum effective dose of azoxystrobin in soybean |
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| Institution: | Institute of Plant Protection and Agricultural Product Quality and Safety, Anhui Academy of Agricultural Sciences/ Key Laboratory of Agro-Product Safety Risk Evaluation (Hefei), Ministry of Agriculture and Rural Affairs, Hefei 230031, China |
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| Abstract: | Azoxystrobin is an important fungicide to control soybean rust. It is an urgent task to clarify the residue characteristic of azoxystrobin in soybean. In this study, ultra performance liquid chromatography tandem mass spectrometry was used to establish a method for the determination of azoxystrobin residues in stems, leaves, pods and soil in soybean planting system. The limit of quantification (LOQ) was 0.005 mg/kg. The results of field experiments in Anhui, Shandong, and Jilin showed that azoxystrobin 250 g/L SC was mainly deposited in soybean leaves after application and the deposition concentration decreased gradually from north to south. The degradation rates were faster in the upper stems and leaves, and there was no significant difference between regions. The relationship between the control effect of azoxystrobin on soybean rust was compared under different doses, and the residues were provided. The minimum effective dose of azoxystrobin was 225 g a.i./hm2. The research results of this paper are of great significance to guide the scientific application of azoxystrobin in soybean production and the practice of pesticide reduction on soybean. |
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