International Journal of Agriculture, Environment and Biotechnology
Citation: IJAEB: 8(2): 449-455 June 2015
DOI Number: 10.5958/2230-732X.2015.00052.2
©2015 New Delhi Publishers. All rights reserved
AGRICULTURE CHEMICALS
Dissipation Studies of Metribuzin in Alfisol Soils and its
Terminal Residues in Potato Tubers
SumanȱKumari 1, ȱNeelamȱSharma* 1 ,ȱRobinȱJoshi 2 ,ȱAshuȱGulati 2 ȱandȱP.C.Sharma 3
1 Department of Agronomy, Forages and Grassland Management, College of Agriculture, CSKHPKV, Palampur-176062, Himachal
Pradesh, India.
2 Department of Biotechnology, CSIR-Institute of Himalayan Bioresources and Technology, Palampur, Himachal Pradesh, India.
3 Department of Entomology, College of Agriculture, CSKHPKV Palampur-176062, Himachal Pradesh, India.
* Corresponding author: sharma_neelam29@rediffmail.com
Paper No. 336
Received: 21 October 2015
Accepted: 26 May 2015
Published: 29 June 2015
Abstract
Aȱfieldȱinvestigationȱwasȱconductedȱtoȱdetermineȱdissipationȱbehaviourȱinȱsoilȱandȱterminalȱresiduesȱ
ofȱmetribuzinȱinȱpotatoȱcropȱappliedȱatȱhalfȱtheȱrecommendedȱdoseȱ(0.25ȱkg.ȱha -1 ),ȱrecommendedȱdoseȱ
(0.50ȱkg.ȱha -1 )ȱandȱdoubleȱtheȱrecommendedȱdoseȱ(1.00ȱkg.ȱha -1 ).ȱSoilȱsamplesȱatȱdifferentȱtimeȱintervalsȱ
afterȱherbicideȱsprayȱandȱpotatoȱtuberȱsamplesȱatȱtheȱmaturityȱofȱcropȱwereȱcollected,ȱprocessedȱandȱ
subjectedȱtoȱmetribuzinȱresidueȱanalysisȱbyȱaȱvalidatedȱgasȱchromatographyȱmethodȱwithȱanȱacceptedȱ
recoveryȱofȱaboveȱ80%.ȱInȱallȱherbicideȱtreatments,ȱmoreȱthanȱ90%ȱofȱappliedȱherbicideȱinȱsoilȱdissipatedȱ
withinȱ45ȱdaysȱafterȱherbicideȱapplication.ȱMetribuzinȱresiduesȱinȱpotatoȱtubersȱatȱtheȱtimeȱofȱharvestȱ
wereȱbelowȱdetectableȱlevels.ȱThisȱindicatedȱthatȱtheȱmetribuzinȱdidȱnotȱleaveȱanyȱresiduesȱinȱpotatoȱ
tuberȱatȱanyȱofȱtheȱappliedȱdoses.ȱFromȱtheȱstudy,ȱitȱmayȱbeȱconcludedȱthatȱpreȱemergenceȱapplicationȱ
ofȱmetribuzinȱinȱpotatoȱforȱweedȱmanagementȱcouldȱbeȱconsideredȱsafe,ȱasȱitsȱresiduesȱwereȱbelowȱtheȱ
prescribedȱMRLȱ(0.05ȱmg.ȱkg -1 ).
Highlights
  • ȱ Aȱmethodȱforȱextractionȱandȱanalysisȱ(byȱGC)ȱofȱmetribuzinȱresiduesȱinȱalfisolȱsoilȱandȱpotatoȱtuberȱ
    • wasȱstandardized.
  • ȱ Recoveryȱefficiencyȱofȱmethodȱwasȱaboveȱ80%
  • ȱ Dissipationȱofȱmetribuzinȱatȱallȱthreeȱlevelsȱofȱapplicationȱviz.ȱ0.25,ȱ0.50ȱandȱ1.00ȱkg.ȱha -1 ȱinȱsoilȱfittedȱ
    • firstȱorderȱkineticsȱdecayȱcurve.
  • ȱ Atȱtheȱtimeȱofȱharvestȱmetribuzinȱrsiduesȱwereȱbelowȱdetectableȱlevelȱinȱpotatoȱtubers.
    • Keywords: ȱHerbicide,ȱrecovery,ȱhalfȱlife,ȱpersistence,ȱmetribuzin
    Potato,ȱ anȱ importantȱ tuberȱ cropȱ whichȱ belongsȱ toȱ wellȱ beingȱ ofȱ masses.ȱ Itȱ isȱ highȱ volumeȱ cropȱ andȱ
    Solanaceaeȱfamilyȱisȱwidelyȱconsumedȱinȱtheȱworld.ȱ yieldsȱsubstantiallyȱmoreȱedibleȱenergy,ȱproteinȱandȱ
    Itȱ isȱ fourthȱ largestȱ cropȱ inȱ worldȱ followingȱ wheat,ȱ dryȱmatterȱperȱunitȱareaȱandȱtimeȱbecauseȱofȱshortȱ
    riceȱ andȱ maizeȱ andȱ rankȱ fifthȱ inȱ termsȱ ofȱ humanȱ vegetativeȱcycleȱthanȱotherȱcrops.ȱItȱisȱanȱexcellentȱ
    consumptionȱ (Hortonȱ 1987).ȱ Potatoȱ cropȱ occupiesȱ sourceȱofȱcarbohydratesȱwithȱlowȱfatȱcontentsȱwhichȱ
    anȱimportantȱplaceȱbothȱinȱnutritionȱandȱeconomicȱ makesȱ itȱ aȱ balanceȱ food.ȱ Itȱ hasȱ wideȱ adaptabilityȱ