3种松材线虫病预防注干剂在马尾松树体内残留动态及防病效果

打开文本图片集

中图分类号：S763 文献标志码：A 文章编号：1000-2006（2025）06-0064-09

Abstract：【Objective】This studyaims to vestigate theresidual eficacy duration various trunk-jected agents on masson pe（Pus massoniana）.Assess transport distribution，residue dynamics， control effectsonpe wilt disease.Evaluate 5% （mass fraction）emamect benzoate soluble liquid， 5% abamect emulsion， 1% emamect benzoate- 9% imidacloprid soluble liquid agents.【Method】Sampled at diffrent parts the pe tree layers.Analyzed residuedynamics the treeusg liquid chromatography-massspectrometry（LC-MS）. Quantitativelyanalyzed the translocation，distribution，residue dynamicsthechemical withpetrees.Folowg trunk jection，oculate the pesdesignasecondary oculationtosimulate contuousnematode festation；contuouslymonitor record diseasedevelopmenttoevaluatethechemical’slong-termprotectiveeficacy.【Result】Threetrunk-jectedagents efctivelyreached variousparts Pusmasoniana，with thema trunk showg thehighestresidue levels branches less so.Residuesgenerallylastedabout three years，peakg the first year，thendeclg.The 5% emamect benzoate had the best transport residue，matag a 24.609mg/kg residue level after three years， remaed at a 37.50% control efficacy after a second oculation.Abamect showed rapid degradation，with no residue detected top branchesafter three years， only 12.50% efficacy after a second oculation.The 1% emamect benzoate- 9% imidacloprid had lower nematode control，resultg the earliest onset.Higher doses effectively creased residue levels，with 60 mL 5% emamect benzoate reachg 33.900mg/kg after one year，much higher than 30mL5% （204 emamect benzoate’s2.405mg/kg.Injection methods hadlitleefectonresiduedistributionat12a.【Conclusion】 Threetrunk-jectedagentscanbetransportedtoallparts thetreeafterjection.Compared with theother two， 5% emamect benzoatehas higher transporteficiencyresidualamount，makg itthepreferredagentlong-term preventioncontrol pewiltdisease.Allthreeagentscaneffectively prevent pe wilt disease arelativelylong timeafter jection.Theresidualamountcontrol efectarestillsignificantoneortwoyearsafterjection，butthe control effect decreases significantly three years after jection.

Keywords：Bursaphelenchusxylophilus；Pusmassoniana；trunk jection；pesticideresidue；disease control efficacy；nematicide

松材线虫病（pewiltdisease，PWD）是由松材线虫（Bursaphelenchusxylophilus）引起的一种维管束病害，对全球松林生态系统造成重大威胁[1]。（剩余16539字）