浙江农业学报 ›› 2023, Vol. 35 ›› Issue (7): 1720-1728.DOI: 10.3969/j.issn.1004-1524.20220807

• 农产品质量安全 • 上一篇    下一篇

两种剂型吡唑醚菌酯在草莓中的残留及消解动态

叶会1,2(), 陈瑜婷1, 骆玉琴2, 范续艳2, 雷圆2, 陆兰菲2, 郝培培3, 程有普1,*(), 张昌朋2,*()   

  1. 1.天津农学院 园艺园林学院,天津 300392
    2.农业农村部农药残留检测重点实验室,浙江省农业科学院 农产品质量安全与营养研究所,浙江 杭州 310021
    3.天津市绿亨化工有限公司,天津 300450
  • 收稿日期:2022-05-31 出版日期:2023-07-25 发布日期:2023-08-17
  • 作者简介:叶会(1996—),女,贵州安顺人,硕士研究生,研究方向为农药残留与农产品安全。E-mail: 827004242@qq.com
  • 通讯作者: *程有普,E-mail: chengyoupu@tjau.edu.cn;
    张昌朋,E-mail: cpzhang1215@zaas.ac.cn
  • 基金资助:
    浙江省基础公益研究计划(LGN21C140006);国家重点研发计划(2019YFC1605600)

Residue and dissipation dynamics of two formulations of pyraclostrobin in strawberry

YE Hui1,2(), CHEN Yuting1, LUO Yuqin2, FAN Xuyan2, LEI Yuan2, LU Lanfei2, HAO Peipei3, CHENG Youpu1,*(), ZHANG Changpeng2,*()   

  1. 1. College of Horticulture and Landscape Architecture, Tianjin Agricultural University, Tianjin 300392, China
    2. Key Laboratory for Pesticide Residue Detection, Ministry of Agriculture and Rural Affairs, Institute of Quality, Safety and Nutrition for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    3. Tianjin Luheng Chemical Co., Ltd., Tianjin 300450, China
  • Received:2022-05-31 Online:2023-07-25 Published:2023-08-17
  • Contact: CHENG Youpu,ZHANG Changpeng

摘要:

为明确吡唑醚菌酯乳油(EC)和微囊悬浮剂(CS)在草莓上的残留规律,分别以两种剂量(90 和150 g·hm-2)于草莓成熟期施药,开展吡唑醚菌酯在草莓及土壤中的残留动态试验。结果表明,吡唑醚菌酯经QuEChERS-UPLC-MS/MS后的最低检测浓度分别为0.002 0(草莓和土壤)和0.005 0 mg·kg-1(叶、茎和根)。在0.002~2 mg·kg-1添加水平下,吡唑醚菌酯(草莓和土壤)的平均回收率为88%~110%,相对标准偏差(RSD)为1%~9%;在0.005~2 mg·kg-1范围内,平均回收率(根、茎及叶)为74%~108%,RSD为2%~9%。残留试验结果表明,吡唑醚菌酯EC和CS施药1 d后在草莓中的残留分别为0.20~0.28 mg·kg-1(90~150 g·hm-2)和0.14~0.20 mg·kg-1(90~150 g·hm-2),残留量低于0.5 mg·kg-1,均符合我国和欧盟在草莓中的限量值。吡唑醚菌酯仅在草莓、茎和叶的降解动态符合一级动力学模型,在草莓中的半衰期为6.6~6.8 d(EC)和7.7~9.8 d(CS),属于易降解农药。试验结果为微囊悬浮剂剂型吡唑醚菌酯在草莓体系上的安全使用提供了数据支持。

关键词: 吡唑醚菌酯, 微囊悬浮剂, 乳油, 农药残留

Abstract:

To clarify the residue patterns of pyraclostrobin on strawberry in the form of emulsifiable concentrate (EC) and microencapsulated suspension (CS), dynamic trials of pyraclostrobin residues in strawberry and soil were conducted at two doses (90 and 150 g·hm-2) during ripening, respectively. The results showed that the minimal concentration of detection of pyraclostrobin based on QuEChERS-UPLC-MS/MS were 0.002 (strawberry and soil) and 0.005 mg·kg-1 (leaf, stem and root), respectively. The average recoveries of pyraclostrobin (strawberry and soil) were 88%-110% with the relative standard deviations (RSDs) of 1%-9% at the spiked levels of 0.002-2 mg·kg-1. The average recoveries (root, stem and leaf) in the range of 0.005-2 mg·kg-1 were 74%-108% with RSDs of 2%-9%. The results of residue trials showed that the residues of pyraclostrobin in EC and CS in strawberry after 1 d of application were 0.20-0.28 mg·kg-1 (90-150 g·hm-2) and 0.14-0.20 mg·kg-1 (90-150 g·hm-2), respectively. The residues were lower than 0.5 mg·kg-1, which were in accordance with the limit values of China and EU in strawberry. The degradation dynamics of pyraclostrobin only in strawberry, stem and leaf were in accordance with the first order kinetic model, and the half-lives in strawberry were 6.6-6.8 d (EC) and 7.7-9.8 d (CS), which were easily degradable pesticides. The trial results provided data to support the safe consumption of microencapsulated suspension dosage form of pyraclostrobin on strawberry.

Key words: pyraclostrobin, microcapsule suspension, emulsifiable concentrate, pesticide residue

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