Weed Management What146s the Difference Between Herbicide Mode of - PDF document

Weed Management: What’s the Difference Between Herbicide Mode of Action and Site of Action? - AgFax Weed SolutionsMOA VS SOA SHAFFER SDSU.html[6/25/2019 4:58:28 PM] Arkansas Rice: Sedge-pocalypse –Identification and Management Sedges haveexploded acrossArkansas in 2019throughoutdifferent croppingsystems.Additionally,Read More Illinois Soybeans: Layering Soil-Residual Herbicides Applying soil-residual herbicideswith non-residual,foliar-appliedherbicides can helpreduce additionalweed Read More Tennessee: Where Do We Standwith Weeds? – Podcast In this week’spodcast, Dr. Larry Weed Management:What’s the Difference oBY GARED SHAFFER, SOUTH DAKOTA STATE UNIVERSITYjsfgb 0 SHARES HOME RECEIVE ADVISORIESABOUT US Weed Management: What’s the Difference Between Herbicide Mode of Action and Site of Action? - AgFax Weed SolutionsMOA VS SOA SHAFFER SDSU.html[6/25/2019 4:58:28 PM] Steckel recapshighlights from theannual Read More Georgia Peanuts: Post-Emerge

nceWeed Control, Tank Mixing We are in the 30-45days after plantingrange for a lotRead More Michigan: Weed ControlRecommendations for Late, For field cropgrowers throughoutthe state it has beena late, Read More Minnesota Weeds: CheckDriftwatch/FieldCheck Before You To reduce thepotential forpesticide driftinjury to sensitivecrops and Read More Herbicides are chemicals that prevent or stop normal plantgrowth and development. These chemicals provide producerscost effective control of many weed species in crop, hay andpasture operations. However, improper application or overuse of herbicides may result in crop injury, poor weedcontrol, herbicide resistant weeds, environmentalcontamination, or health risks.Mode of Action (MOA)All herbicide interactions with the plant, from application tofinal effect, are considered the mode of action. The mode ofaction involves absorption into the plant, translocation ormovement in the plant, metabolism of the herbicide, and thephysiological

plant response.Site of Action (SOA)Herbicide Site of Action is the specific process in plants thatthe herbicide disrupts to interfere with plant growth anddevelopment. The SOA is the most important aspect ofherbicides when dealing with prevention and control ofherbicide resistant weeds. The National Weed ScienceSociety has numbered each group of herbicides under thesame MOA and SOA for ease of reference when planningyour herbicide program (Table 1).Table 1. Herbicide Mode of Action and Site of Action.HerbicideMode OfAction(WSSA #)HerbicideSite Of ActionProductLipid SynthesisInhibitors1-ACCasePoast,Amino Acid2-ALSInhibitorsAlly,Pursuit Weed Management: What’s the Difference Between Herbicide Mode of Action and Site of Action? - AgFax Weed SolutionsMOA VS SOA SHAFFER SDSU.html[6/25/2019 4:58:28 PM] Herbicides: How Do Hot, DryConditions Affect Performance? For the past severalweeks, the FloridaPanhandle has experienced hot and Read More Illinois: Dicamba – Applicatio

n DateExtended The IllinoisDepartment ofAgriculture (IDOA)has announced itwill extend theRead More Minnesota: Weed ManagementUnder Delayed Planting Conditions – Our guest this weekwas Dr. JeffGunsolus,University ofMinnesotaExtension Read More SynthesisInhibitors9-EPSPSynthaseInhibitorRoundup,GrowthRegulators4-T1R1 AuxinReceptorsClarity,Starane,2,4D19-AuxinTransportInhibitorcomponentPhotosynthesisInhibitors5-II Inhibitorsbinding than6 & 7)AAtrex,6-PhotosystemII Inhibitors(differentbinding than5 & 7) 7-PhotosystemII Inhibitors(different5 & 6)DirexNitrogenMetabolismInhibitors10-GlutamineSynthetaseInhibitorLiberty,Cheetah12-PhytoeneInhibitorSonar Weed Management: What’s the Difference Between Herbicide Mode of Action and Site of Action? - AgFax Weed SolutionsMOA VS SOA SHAFFER SDSU.html[6/25/2019 4:58:28 PM] Minnesota: Palmer Pigweed inManure – What Can You Do? The MinnesotaDepartment ofAgriculture hasidentified manureas a pathway ofRead More Herbicide Resistan

ceInfoPigmentInhibitors13-DOXPInhibitorCommand27-HPPDInhibitorsCallisto,Cell Membrane14-PPOAim, Valor,22-PhotosystemI ElectronGramoxoneSeedling Root3-Prowl H20,TreflanSeedlingShoot GrowthInhibitors8-LipidSynthesis(Not ACCase)Bolero,Far-Go15-Long-AcidInhibitorsHarness,Magnum,Zidua16-SpecificSiteUnknownNortonUndefined17-NucleicAcid InhibitorMSMA Weed Management: What’s the Difference Between Herbicide Mode of Action and Site of Action? - AgFax Weed SolutionsMOA VS SOA SHAFFER SDSU.html[6/25/2019 4:58:28 PM] Waterhemp Scores Again – Resistance Found to Yet Another Herbicide Group – DTN Resistant Pigweed Seed – 3 Top-Rated Ways To Slash The Volume Reducing Pigweed Numbers With Windrow Burning – Basic “Blueprints” Here Weed Resistance Management – 6 Ways Your 2017 Planning Starts Now Herbicide Resistance – Prevention Starts In The Tank Resistance ManagementAs you can see from the table, there are 10 modes of actionbut only 8 of those

are widely used, which in turn limits theavailable sites of action. There are over 700 registeredherbicide products in South Dakota. Those products use 8modes of action with 18 sites of action. Weed species that areresistant to three different sites of action: (SOA 1) ACCase,(SOA 2) ALS Inhibitors, and (SOA 9) EPSP SynthaseInhibitor (International Survey of Herbicide Resistant Weeds ), are present in South Dakota.More cases of resistance could be present, but not yetherbicide sites of action within different modes of action asmuch as possible. If you have suspected resistance on yourland, please contact SDSU Extension so the proper measurescan be taken. TAGS HERBICIDE APPLICATIONS HERBICIDE RESISTANCE HERBICIDES MODES OF ACTION SITES OF ACTION SOUTH DAKOTA WEED MANAGEMENTo 0 SHARES Weed Management: What’s the Difference Between Herbicide Mode of Action and Site of Action? - AgFax Weed SolutionsMOA VS SOA SHAFFER SDSU.html[6/25/2019 4:58:28 PM] Contact us: owen@agfax.com