Weed Management Trials

The Renz Lab conducts weed management field experiments with the goal of improving management outcomes in natural areas, pollinating insect-friendly plantings, pastures, and perennial cropping systems. These experiments study new ways of minimizing injury to desired vegetation, maximizing control of target weeds, reducing the spread of invasive plants, and increasing establishment of desired vegetation.

The results of these experiments are published below. The reports are intended to help farmers, restoration ecologists, landowners, and researchers stay up to date on the latest and most effective herbicides for their land management goals.

Trial IDYearCropping System or GoalTarget SpeciesPrimary Management MethodsFull ReportExecutive Summary
12-32012AlfalfaAnnual WeedsHerbicides (Warrant, Weathermax, Select Max, Raptor)PDF
12-42012AlfalfaAnnual and Perennial WeedsHerbicides (glyphosate, Chateau, Raptor, Pursuit, Prowl, Warrant)PDF
12-52012AlfalfaAnnual WeedsHerbicides (Warrant, Weathermax, Select Max, Raptor)PDF
16-32016AlfalfaAnnual WeedsHerbicides (Alion as compared to recommended standards)PDF
16-62016AlfalfaAnnual WeedsSeeding Rates,
Herbicide (Glyphosate)
PDF
16-72016AlfalfaAnnual and Perennial WeedsHerbicides (Warrant, glyphosate, Raptor, Select Max)PDF
17-122017AlfalfaAnnual WeedsHerbicides (glyphosate, Warrant)PDF
18-122018AlfalfaWinter Annual WeedsHerbicides (Warrant as compared to recommended standards)
PDF
19-92019AlfalfaAlfalfa (medicago sativa)Plant Growth Regulator (Kudos)PDF
12-12012Interseeded Corn-AlfalfaHerbicides (Apogee)PDF
16-42016Interseeded Corn-AlfalfaAnnual WeedsHerbicides (Warrant, Dual Magnum, Buctril)PDF
16-52016Interseeded Corn-AlfalfaAnnual WeedsHerbicides (Warrant, Dual Magnum, Buctril)PDF
18-152018Interseeded Corn-Alfalfa-Plant Growth Regulator (Kudos)
PDF
18-162018Interseeded Corn-Alfalfa-Plant Growth Regulator (Kudos), Fungicide (Priaxor)
PDF
18-172018Interseeded Corn-Alfalfa-Plant Growth Regulator (Kudos), Fungicide (Priaxor), Insecticide (Warrior II)
PDF
19-162019Interseeded Corn-Alfalfa-Plant Growth Regulator (Kudos), Fungicide (Priaxor), Insecticide (Warrior II)
PDF
19-172019Interseeded Corn-Alfalfa-Plant Growth Regulator (Kudos), Fungicide (Priaxor), Insecticide (Warrior II)
PDF
20-132020Interseeded Corn-AlfalfaPlant Growth Regulator (Kudos), Fungicide (Priaxor), Insecticide (Warrior II)
PDF
20-142020Interseeded Corn-AlfalfaPlant Growth Regulator (Kudos), Fungicide (Priaxor), Insecticide (Warrior II)
PDF
11-12011Invasive Plant Controlbirdsfoot trefoil (Lotus corniculatus)Herbicides (AMCLO-GF-2791, Milestone, Transline)PDF
12-22012Invasive Plant ControlJapanese knotweed (Fallopia japonica)Herbicides (Milestone as compared to recommended standards)PDF
12-62012Invasive Plant ControlCanada thistle (Cirsium arvense)Herbicides (DPX-MAT28, Milestone)PDF
12-72012Invasive Plant Controlspotted knapweed (Centaurea biebersteinii)Herbicides (Perspective, DPX-MAT28, Milestone, 2, 4-D-Dimethylamine salt)PDF
12-82012Invasive Plant ControlCanada thistle (Cirsium arvense)Herbicides (Milestone, Transline, Telar, Opensight, Perspective)PDF
12-92012Invasive Plant Controlsweet clover (Melilotus officinalis)Herbicides (Amclo-GF-2791, Milestone, Transline)PDF
12-102012Invasive Plant Controltall fescue (Lolium arundinaceum)Herbicides (Opensight, Milestone, Powerflex)PDF
12-112012Invasive Plant Controlleafy spurge (Euphorbia esula)Herbicides (Perspective, DPX-MAT28, Overdrive, Tordon)PDF
14-12014Invasive Plant ControlJapanese knotweed
(Fallopia japonica)
Herbicide (Milestone)PDF
14-22014Invasive Plant ControlJapanese knotweed
(Fallopia japonica)
Herbicide (Milestone)PDF
15-22015Invasive Plant Controlbohemian knotweed
(Fallopia X bohemica)
Herbicide (Milestone)PDF
16-12016Invasive Plant Controlhoneysuckle (Lonicera sp.)Herbicides (Method as compared to recommended standards)PDF
16-22016Invasive Plant Controlwild parsnip (Pastinaca sativa)Herbicides (Method as compared to recommended standards)PDF
17-22017Invasive Plant Controlautumn olive (Elaeagnus umbellata)Herbicides (Method as compared to recommended standards)PDF
17-32017Invasive Plant Controlwild parsnip (Pastinaca sativa)Herbicides (Method as compared to recommended standards)PDF
17-42017Invasive Plant Controlcommon tansy (Tanacetum vulgare)Herbicides (Method as compared to recommended standards)PDF
17-52017Invasive Plant Controlbush honeysuckles (Lonicera sp.), buckthorn (Rhamnus sp.)Herbicides (triclopyr)
Goat Grazing
PDF
17-92017Invasive Plant Controlgarden valerian (Valeriana officinalis)Herbicides (2,4-D, Clarity, Escort, Remedy, Transline, Chaparral, Milestone)
PDF
18-12018Invasive Plant ControlJapanese barberry (Berberis thunbergii)Herbicide (Maleic Hydrazide)PDF
18-22018Invasive Plant Controlcrown vetch (Coronilla varia)Herbicides (Method as compared to recommended standards)PDF
18-32018Invasive Plant ControlJapanese barberry (Berberis thunbergii)Herbicides (Method as compared to recommended standards)PDFSummary
18-52018Invasive Plant Controlwild parsnip (Pastinaca sativa)Herbicides (florpyrauxifen as compared to recommended standards)PDF
18-142018Invasive Plant Controlphragmites (Phragmites australis)Herbicides (fluazifop-p-butyl)PDF
19-12019Invasive Plant Controlgarlic mustard (Alliaria petiolata)Herbicides (Esplanade, glyphosate)PDF
19-42019Invasive Plant Controlcommon buckthorn (Rhamnus cathartica)Herbicides (Method as compared to recommended standards)PDFSummary
19-102019Invasive Plant Controlgolden creeper / red hailstone (Thladiantha dubia)Herbicides (GREENHOUSE) (glyphosate, Arsenal, Escort)PDF
19-11S2019Invasive Plant Controlgolden creeper / red hailstone (Thladiantha dubia)Herbicides in summer (FIELD) (glyphosate, Arsenal, Escort, Garlon 4, Method, Milestone)PDFSummary
19-11F2019Invasive Plant Controlgolden creeper / red hailstone (Thladiantha dubia)Herbicides in fall (FIELD) (glyphosate, Arsenal, Escort, Garlon 4, Method, Milestone)PDFSummary
19-122019Invasive Plant ControlReed manna grass (Glyceria maxima)Herbicides (fluazifop, glyphosate)PDFSummary
19-132019Invasive Plant Controlphragmites (Phragmites australis)Herbicides (fluazifop, glyphosate)PDFSummary
20-22020Invasive Plant Controlburning bush (Euonymus alatus)Herbicides (Method as compared to recommended standards)PDFSummary
20-32020Invasive Plant Controlautumn olive (Elaeagnus umbellata)Herbicides (TerraVue as compared to recommended standards)PDFSummary
20-42020Invasive Plant Controlcommon buckthorn (Rhamnus cathartica)Herbicides (Milestone as compared to recommended standards)PDFSummary
20-62020Invasive Plant ControlCanada thistle (Cirsium arvense)Herbicides (Elevore or Loyant combined with Remedy Ultra, Vista XRT, or Transline)PDFSummary
20-72020Invasive Plant Controlcrown vetch (Coronilla varia)Herbicides (Tordon, Loyant, Elevore, Transline)PDFSummary
20-122020Invasive Plant Controlwild parsnip (Pastinaca sativa)Herbicides (Loyant, Elevore)PDFSummary
11-32010Pasturen/aHerbicides (Ryzup)PDF
15-12015PastureInvasive Shrubs (Multiflora Rose, Bush Honeysuckle, Prickly Ash)Herbicides (Crossbow, Pasturegard, Forefront, Remedy, Chaparral)PDF
15-32015Pasturewhorled milkweed (Asclepias verticillata)Herbicides (Pasturegard HL, Weedmaster)PDF
17-62017Pasturewild carrot (Daucus carota), red clover (Trifolium pratense)Herbicides (ProClova / GF-3731)PDF
17-72017Pasturewild carrot (Daucus carota)Herbicides (aminopyralid, XDE-848 BE, GrazonNext HL, Chaparral)PDF
17-82017Pasturewild carrot (Daucus carota)Herbicides (aminopyralid, XDE-848 BE, GrazonNext HL, Chaparral)PDF
18-42018Pastureperennial weedsDry fertilizer impregnated with herbicides (aminopyalid + florpyrauxifen, GrazonNext, Chaparral)PDF
20-52020Pastureburdock sp. (Arctium sp.)Herbicides (florpyrauxifen as compared to recommended standards)PDFSummary
20-102020Pasturewild carrot (Daucus carota)Herbicides (florpyrauxifen as compared to recommended standards)PDFSummary
20-112020Pasturewild carrot (Daucus carota)Herbicides (florpyrauxifen as compared to recommended standards)PDFSummary
09-12009Prairie/Grassland/CRPAnnual WeedsHerbicides (Journey as compared to recommended standards)PDF
09-22009Prairie/Grassland/CRPAnnual and Perennial WeedsHerbicides (glyphosate, Journey, Drive, Accent)PDF
09-42009Prairie/Grassland/CRPAnnual WeedsHerbicides (glyphosate, Journey, Drive, Accent)PDF
13-12013Prairie/Grassland/CRPNative ForbsHerbicides (aminopyralid, clopyralid)PDF
16-82016Prairie/Grassland/CRPAnnual WeedsHerbicides (Dual Magnum, Atrazine, Weedmaster)PDF
17-12017Prairie/Grassland/CRPAnnual WeedsHerbicides (Esplanade, indaziflam + rimsulfuron, glyphosate, CleanTraxx, Prowl H2O)PDF
17-102017Prairie/Grassland/CRPBare GroundHerbicides (glyphosate, Esplanade, indaziflam + rimsulfuron)PDF
18-92018Prairie/Grassland/CRPAnnual WeedsCover Cropping, Mowing, Herbicides (Journey, Milestone, glyphosate, Esplanade, Prowl H2O)PDF
18-112018Prairie/Grassland/CRPAnnual WeedsCover Cropping, Mowing, Herbicides (Journey, Milestone, glyphosate, Esplanade, Prowl H2O)PDF
19-32019Prairie/Grassland/CRPAnnual WeedsHerbicides (Esplanade, Method)PDFSummary
19-142019Prairie/Grassland/CRPTimothy (Phleum pratense)Herbicides (bicyclopyrone, Moxy 2, Starane Ultra, Huskie)PDFSummary
20-12020Prairie/Grassland/CRPAnnual WeedsHerbicides (Esplanade, Method)PDFSummary
20-82020Prairie/Grassland/CRPNative ForbsHerbicides (ProClova, GF-4574)PDFSummary
20-92020Prairie/Grassland/CRPNative ForbsHerbicides (Milestone, TerraVue, DuraCor)PDFSummary