Canada Thistle (<i>Cirsium arvense</i>) Control with Aminopyralid in Range, Pasture, and Noncrop Areas

Enloe, Stephen F.; Lym, Rodney G.; Wilson, R. G.; Westra, Phil; Nissen, Scott J.; Beck, George; Moechnig, Mike; Peterson, Vanelle F.; Masters, Robert A.; Halstvedt, Mary B.

doi:10.1614/wt-07-004.1

Cited by 40 publications

(47 citation statements)

References 14 publications

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“…Most of the applied aminocyclopyrachlormethyl ester was metabolized to the free acid at 6 HAT, which is similar to other herbicides applied as pro-herbicidal methyl and ethyl esters ; Thompson and Nissen 2000). Bukun et al (2009) demonstrated that the auxin herbicide aminopyralid had less translocation to Canada thistle roots than clopyralid, although aminopyralid provides greater Canada thistle control at lower use rates (Enloe 2007). These researchers speculated that aminopyralid may have greater biological activity compared with clopyralid.…”

Section: Resultsmentioning

confidence: 86%

Absorption and Translocation of Aminocyclopyrachlor and Aminocyclopyrachlor-Methyl Ester in Canada Thistle (Cirsium arvense)

et al. 2010

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Laboratory studies were conducted using 14 C-aminocyclopyrachlor (DPX-MAT28) and its 14 C-methyl ester formulation (DPX-KJM44) to (1) determine the adjuvants' effects on absorption, (2) compare the absorption and translocation of aminocyclopyrachlor free acid with the methyl ester, and (3) determine the rate at which aminocyclopyrachlor-methyl ester is metabolized to the free acid in Canada thistle. Canada thistle plants were grown from root cuttings and treated in the rosette growth stage. The effect of different adjuvants on absorption was determined by treating individual leaves with formulated herbicide plus 14 C-herbicide alone or with methylated seed oil (MSO), crop oil concentrate, or nonionic surfactant with and without urea ammonium nitrate and ammonium sulfate. Plants were harvested 96 h after treatment (HAT). For absorption and translocation experiments, plants were oversprayed with aminocyclopyrachlor or its methyl ester at a rate of 0.14 kg ae ha 21 in combination with 1% MSO. Formulated herbicide plus 14 C-herbicide was then applied to a protected leaf, and plants were harvested 24 to 192 HAT. Plants were harvested and radioactivity was determined in the treated leaf and in aboveground and belowground tissues. Metabolism of aminocyclopyrachlor-methyl ester to the free acid was determined 2, 6, and 24 HAT. All aboveground biomass was analyzed by high-performance liquid chromatography to establish the ratio of methyl ester to free acid. MSO applied with either herbicide formulation resulted in the highest absorption compared with no surfactant. Significantly greater aminocyclopyrachlor-methyl ester was absorbed, compared with the free acid, which was reflected in the greater aboveground translocation for the methyl ester. Both formulations had similar amounts of translocation to the roots, with 8.6% (SE 6 3.3) for the methyl ester compared with 6.2% (SE 6 2.5) for the free acid. Approximately 80% of the methyl ester was converted to the free acid at 6 HAT. Based on this conversion rate, aminocyclopyrachlor translocated as the free acid in Canada thistle. Nomenclature: Aminocyclopyrachlor

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Section: Resultsmentioning

confidence: 86%

Absorption and Translocation of Aminocyclopyrachlor and Aminocyclopyrachlor-Methyl Ester in Canada Thistle (Cirsium arvense)

et al. 2010

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“…For example, aminopyralid provided 90% or better control of Canada thistle 1 yr after treatment at rates ranging from 0.08 to 0.11 kg ai ha 21 when applied in the spring (at bolting) or in the fall (Enloe et al 2007). Canada thistle control with 0.11 kg ai ha 21 aminopyralid was effective 22 mo after treatment, with 62% reductions following 84% reductions 10 mo after treatment (Samuel and Lym 2008).…”

Section: Resultsmentioning

confidence: 99%

“…Specifically, we aimed to increase C 4 grasses (primarily switchgrass, sideoats gramma, and little bluestem) and decrease C 3 grasses, which were dominated by mat-forming perennial grasses with high rates of lodging (e.g., primarily fescue and, to a lesser extent, Kentucky bluegrass, Poa pratensis L.). Aminopyralid is an auxinic herbicide that is applied at low-use rates (reducing environmental impact and cost) and has been shown to provide equal or better control of Canada thistle when compared with 2,4-D, clopyralid, and dicamba (Enloe et al 2007). Prescribed fire in the northern Great Plains is frequently applied to improve grassland productivity and reduce introduced C 3 perennial grasses such as Kentucky bluegrass and smooth brome (Bromus inermus Leyss.)…”

mentioning

confidence: 99%

Managing Canada Thistle (Cirsium arvense) in a Constructed Grassland with Aminopyralid and Prescribed Fire

Gramig¹,

Ganguli²

2015

Invasive plant sci. manag.

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A p r a i r i e r e s t o r a t i o n h a n d b o o k f o r M i n n e s o t a l a n d o w n e r s M i n n e s o t a D e p a r t m e n t o f N a t u r a l R e s o u r c e s S e c t i o n o f E c o l o g i c a l S e r v i c e s S c i e n t i f i c a n d N a t u r a l A r e a s P r o g r a m A p r a i r i e r e s t o r a t i o n h a n d b o o k f o r M i n n e s o t a l a n d o w n e r s w r i t t e n , i l l u s t r a t e d , a n d p r o d u c e d b y R e b e c c a K i l d e , W i n d m i l l G r a p h i c s e d i t e d b y E l l e n F u g e , S c i e n t i f i c a n d N a t u r a l A r e a s P r o g r a m , M i n n e s o t a D N R • SCIE N T IF IC A N D NA TURAL AR E A S Years of Preservation Going Native a b o u t t h i s p u b l i c a t i o nThis booklet is intended as a guide for Minnesota landowners interested in doing their own small (up to 20 acres) planting of a native prairie community where none remains. Once you have made the decision to establish a prairie plant community, it is important to develop a plan of action. This publication provides the specific steps you will need to consider and follow.There is an important distinction between the meaning of "restoration" and "reconstruction," although you may hear the words used interchangeably. Prairie reconstruction or planting refers to reestablishing native plants such as prairie grasses and flowers on a site that probably grew there before being eliminated by lawns, crops, or other development.A prairie restoration, on the other hand, refers to an existing native prairie remnant, a small piece of prairie that has never been completely eradicated, that is being managed to improve the native prairie plant community. Removing problem species, reintroducing fire, and possibly adding seed or seedlings are the management tools used to supplement existing species diversity.Before you start digging, do take the time to do a plant survey. It could be that you already have native plants on your site which are uniquely adapted to your particular soil and microclimate. Often, a damaged remnant can be returned to a condition close to its original state by nurturing surviving plants and animals. We are promoting the use of native prairie plants and prairie reconstruction, but we want to point out that the best way to preserve native prairie (and other native communities) is to protect and enhance the remaining pieces of native habitat.If you have a degraded prairie remnant, it may be a better choice to create an environment in which those plants will thrive, rather than to start all over with new seeds and species. This requires a different application of techniques than the ones outlined in this publication, and other resources should be consulted. A mingling of everything which ever whistled here, leaped or waved in the wind. Plants and animals, grasses of this prairie. Buffalo and antelope grazing down into roots and back again into the sun. Birds and insects, their wings still hum in this soil.And this swarm drinks sunlight and rain, and rises again and again i...

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“…The newer chemistries in this study (metsulfuron methyl, aminopyralid, and aminocyclopyrachlor) have all been recommended as having low dose rates, low toxicity to mammals, and a favorable environmental profile (68)(69)(70)(71)(72). However, all have potential for drift and for groundwater contamination, especially in areas with highly permeable soils or where the water table is shallow.…”

Section: Safetymentioning

confidence: 99%

Integrated Vegetation Management (IVM) for INDOT Roadsides

Herold¹,

Lowe²,

Dukes³

2014

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JOINT TRANSPORTATION RESEARCH PROGRAMThe Joint Transportation Research Program serves as a vehicle for INDOT collaboration with higher education institutions and industry in Indiana to facilitate innovation that results in continuous improvement in the planning, design, construction, operation, management and economic efficiency of the Indiana transportation infrastructure. https://engineering.purdue.edu/JTRP/index_html Published reports of the Joint Transportation Research Program are available at: http://docs.lib.purdue.edu/jtrp/ NOTICEThe contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views and policies of the Indiana Department of Transportation or the Federal Highway Administration. The report does not constitute a standard, specification or regulation. AbstractWith over 90,000 miles of road in Indiana, it is important that adjoining vegetation be maintained for safety concerns, road structure maintenance and aesthetics. Mowing is currently the main form of vegetation management on INDOT (Indiana Department of Transportation) roadside. Ever-increasing fuel costs and the high labor demand associated with mowing leads to millions of dollars spent on in-house and contract mowing cycles each year. Drastic cost reductions can be achieved by reducing mowing cycles through the incorporation of other management tools including herbicide and native plantings. This study provides data on six herbicide tank mixtures (Milestone/Escort; Milestone/Escort/Plateau; Perspective; Perspective/Plateau; Viewpoint/Streamline; and 2,4-D/Escort/Plateau) and two mowing cycles (one-cycle and two-cycle) at six sites across the state. All herbicide treatments decreased broadleaf cover better than mowing treatments. Herbicide treatments containing Plateau, a plant growth regulator that retards coolseason grass growth, had the shortest grass height. Herbicide mixtures without Plateau were still shorter than mowing plots due to the seedhead suppression qualities found in the selective broadleaf herbicides. A cost savings of over 40% is achieved with one application of herbicide in lieu of one cycle of mowing. Further cost savings can be achieved through the planting of native vegetation, which was the focus of the second portion of this project. Four native seed mixes (western wheat, short grass, tall grass and short grass with forbs)were analyzed for use on right-of-ways. Successful native plantings have reduced maintenance costs for many DOTs across the country by eliminating mowing and herbicide needs. Drought and persistent weeds at study sites resulted in a sparse covering of native species during the year after planting. This is not uncommon for native roadside planting studies since many native grass species require two to three growing seasons to establish. The first portion of this study examines the use of herbicide and mowing at six sites throughout the state of Indiana. Two mowing t...

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Canada Thistle (Cirsium arvense) Control with Aminopyralid in Range, Pasture, and Noncrop Areas

Cited by 40 publications

References 14 publications

Absorption and Translocation of Aminocyclopyrachlor and Aminocyclopyrachlor-Methyl Ester in Canada Thistle (Cirsium arvense)

Absorption and Translocation of Aminocyclopyrachlor and Aminocyclopyrachlor-Methyl Ester in Canada Thistle (Cirsium arvense)

Managing Canada Thistle (Cirsium arvense) in a Constructed Grassland with Aminopyralid and Prescribed Fire

Integrated Vegetation Management (IVM) for INDOT Roadsides

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