数字农科院2.0

药用牡丹典型病害高效防治药剂筛选及残留特征分析

文献类型: 中文期刊

关键词: 牡丹;;红斑病;;根结线虫病;;QuEChERS 技术;;残留分析

期刊名称:农药

ISSN: 1006-0413

年卷期: 2025 年

页码:

收录情况: 北大核心(2023版) ; ; CSCD(2025-2026年度) ; ; 科技核心(2024版) ; ; 农林核心(2024版)

摘要: [目的]针对牡丹红斑病和根结线虫病高效防治药剂较少的问题,开展2 种病害高效防治药剂的筛选,并阐明其在牡丹上的残留特征。[方法]通过室内生物活性测试和大田防效试验,分别研究不同药剂对牡丹红斑病和根结线虫病的防治效果。建立基于QuEChERS 样品前处理技术和超高效液相色谱-串联质谱(UPLC-MS/MS)检测牡丹中不同药剂残留量的方法,并对方法的准确度和精密度进行评价。通过田间残留试验,明确各药剂在药用牡丹中的残留特征。[结果]吡唑醚菌酯、苯醚甲环唑和嘧菌酯对牡丹红斑病病原菌的抑制效果较好,EC50值分别为1.279、1.374、0.909 mg/L。三氟吡啶胺、氟吡菌酰胺对牡丹根结线虫的抑制效果较好,LC50 值分别为0.292、0.724 mg/L。进一步的大田防效结果表明,25% 吡唑醚菌酯悬浮剂、10% 苯醚甲环唑悬浮剂、30% 嘧菌酯悬浮剂和450 g/L 三氟吡啶胺悬浮剂、400 g/L 氟吡菌酰胺悬浮剂对2 种病害的防治效果较好,田间防效均大于80%。牡丹样品中残留的吡唑醚菌酯、苯醚甲环唑、氟吡菌酰胺、三氟吡啶胺经乙腈提取,25 mg PSA 净化,UPLC-MS/MS检测。在3 个添加水平下回收率为82.7%~95.1%,相对标准偏差(RSD)为1.4%~6.5%,线性相关系数(r)均>0.99。在全国牡丹主产区进行的1年4地残留试验结果表明,4种药剂在牡丹中的最终残留量中值(STMR)均<0.010 mg/kg,残留水平较低。[结论]为牡丹红斑病和根结线虫病的防治筛选出高效安全药剂,对保障牡丹产业的可持续发展具有重要意义。

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