Quantification of pendimethalin residue in green fodder and silage of winter cereals using gas chromatography-tandem mass spectrometry

IF 1.5 4区 农林科学 Q2 ENTOMOLOGY Journal of Pesticide Science Pub Date : 2023-11-30 DOI:10.1584/jpestics.d23-045
Navjot Singh Brar, Kousik Mandal, Simerjeet Kaur, Amanpal Kaur Sandhu, Makhan Singh Bhullar, Maninder Pal Singh
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Abstract

Use of agro-chemicals in forage crops is restricted due to the fear of direct toxicity to livestock and risk of pesticide residue accumulation in the food chain. Wheat and barley can be used as green fodder and silage, and herbicide residue estimation in green fodder and silage is important for ensuring the safety of dairy cattle. A field experiment was conducted for two years to study pendimethalin residues in the green fodder and silage of wheat and barley. In both cereal crops, pendimethalin (1.125 kg a.i./ha) was applied as pre-emergence along with an unsprayed control. Pendimethalin residues in fodder, silage, and soil were estimated using gas chromatography-tandem mass spectrometry (GC-MS/MS). At harvest, pendimethalin residues in fodder and silage of wheat and barley were below the limit of quantification (<0.01 mg/kg) during both crop seasons. Pendimethalin can be safely used for weed control in winter cereals grown for fodder and silage.

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气相色谱-串联质谱法测定冬粮青饲料和青贮中二甲甲烷残留
由于担心对牲畜产生直接毒性以及农药残留在食物链中积累的风险,在饲料作物中使用农用化学品受到限制。小麦和大麦可作为青饲料和青贮饲料,青饲料和青贮饲料中除草剂残留量的测定对保证奶牛的安全具有重要意义。通过为期两年的田间试验,研究了小麦和大麦青贮饲料和青贮饲料中戊二甲基灵的残留量。在这两种谷类作物中,作为出苗前施用了戊二甲基灵(1.125千克a.i./公顷),同时施用了未喷洒的对照剂。采用气相色谱-串联质谱法(GC-MS/MS)对饲料、青贮饲料和土壤中的二甲甲烷残留量进行了测定。收获季节,小麦和大麦的饲料和青贮料中戊二甲基灵残留量均低于定量限(0.01 mg/kg)。在饲料用和青贮用冬季谷物中,戊二甲基灵可安全用于杂草防治。
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来源期刊
Journal of Pesticide Science
Journal of Pesticide Science 农林科学-昆虫学
CiteScore
4.30
自引率
4.20%
发文量
28
审稿时长
18-36 weeks
期刊介绍: The Journal of Pesticide Science publishes the results of original research regarding the chemistry and biochemistry of pesticides including bio-based materials. It also covers their metabolism, toxicology, environmental fate and formulation.
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