28-高芸苔素内酯对韭中腐霉利残留量的影响

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关键词：28-高芸苔素内酯；韭（Alliumtuberosum）；腐霉利；残留量

中图分类号：S481.8；S436.33 文献标识码：A

文章编号：0439-8114（2025）06-0167-04

DOI：10.14088/j.cnki.issn0439-8114.2025.06.028 开放科学（资源服务）标识码（OSID）：i

Effect of 28-homobrassinolide on procymidone residue levels in Allium tuberosum

WANG Mei-mei，ZHU Bao-yu，YU Ting-yu，XING Gao-shan，LIAO Can，ZHU Xiang，LI Jun-kai （CollegeofAgriculture，YangtzeUniversity，Jingzhou 434O25，Hubei，China）

Abstract：Toinvestigatethefectof28-homobrassinolideonprocymidoneresiduelevelsinAliumtuberosum，seventreatmentswere establishedusing2-omobrassinolideasthetestagent，withacontrolgoupspradwithprocydonebutnot28-ombrassinolide. Samples were pretreated using theQuEChERS technique，and procymidoneresidue levels inAlium tuberosum were determined by GC-MS.Results showedthatprocymidoneresiduelevelsinAllum tuberosumat1daypost-treatment were higherinthe28-homobrassinolide-treated groups than in the control.Under high-dose conditions（O.2O and 0.10mg/L ），procymidone residue levels at1 daypost-treatmentexceededtheothertreatments，regardlessofwhether28-homobrasinolidewasappliedoncebefore treamentor twice（pre and post-treatment），indicating that high-dose28-homobrassinolide temporarily enhanced procymidone absorption.At2 days post-treatment，alltreatments exhibitedrapidreductions inprocymidoneresiduelevels，butresiduesremainedhigherthanthe control in groups treated with O.20 mg/L 28-homobrassinolide（once or twice）and 0.10mg/L 28-homobrassinolide（twice）.From 3 dayspost-treatmentoard，procyidonesiduelevelsin8-omobrasinolidtreatdAlimtberosumdeclindapidlywithfast erdegradationobservedinthedouble-applicationgroupscompared tosingle-application groups.Under naturalconditions，procyidone residue levels in Alium tuberosum gradually decreased post-treatment，with a degradation curve equation of y =8.934 4e -0.19/t ， correlation coefficient （r）=0.9854 ，and ahalf-life（ T1/2 ）of 3.52 days.All 28-homobrassinolide-treated groups exhibited shorter procymidonedegradationalf-livestanthecontrol，demonstratingtat2homobrassiolidefectivelyeleratedprocymidoederadation in Allium tuberosum.

KeyWords：28-homobrassinolide；Allium tuberosum；procymidone；residue levels

韭（Alliumtuberosum）又名韭菜，是百合科多年生草本宿根植物，作为中国"菜篮子"工程的重要品类，常年种植面积达35万 hm2[1] 。（剩余6194字）