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Integrated Weed Management Recommendations <br /> Effective integrated management means using a variety of eradication methods along with restoration, prevention <br /> of seed production and dispersal, and monitoring. Maintain robust healthy native landscapes. Restore degraded <br /> sites.Avoid soil disturbance. Prevent seed production in the first and second year. Prevent seed from dispersing,e.g. <br /> contaminated equipment. Rest sites until restored. Change land use practices. Use methods appropriate for the site; <br /> disturbing wetlands,fens and riparian areas is generally not advised without proper training. <br /> CULTURAL CONTROL METHODS <br /> Maintain or restore a competitive assemblage of forbs, cool and warm season grasses. <br /> Implement whole site restoration of soils, plants and water regimes where stands of <br /> common teasel exist.Use locally adapted species that are ecologically appropriate for the <br /> site to improve competitiveness(e.g.wetland plants or upland plants). Include annual as <br /> well as perennial species. Incorporate soil amendments, soil microbes and mycorrhizal <br /> ~' fungi in restoration efforts. Minimize soil compaction and disturbance, especially in <br /> wetlands and moist soil. Acquire permits for wetland restoration,if required. <br /> nn R BIOLOGICAL CONTROL METHODS <br /> `J > ► Common teasel is not palatable to domestic livestock in part because of the abundance <br /> of prickles. Properly managed grazing can improve vigor of desired species and indireclty <br /> M. reduce common teasel.There are no biological control agents for common teasel authorized <br /> �• '� in Colorado that would effectively control common teasel. For more information about <br /> J IA ; a: biological control agents,visit the Colorado Department of Agriculture's Palisade Insectary <br /> Q ,� $ L t ,• = website at https://www.colorado.gov/pacific/`agconservation/biocontrol <br /> oseeveagwr,,ursiatetu�ersaY,eug—d . <br /> MECHANICAL CONTROL METHODS <br /> rMechanical methods are best for infestations smaller than 0.5 acres; weigh this against <br /> other plants present, ecology and site condition. Sever roots below the soil surface <br /> during the first year before the plant stores energy, and in the second year before seed <br /> production. Mowing, chopping and deadheading stimulates more flower production; <br /> these methods require consecutive years of season-long treatments. Flower heads must <br /> V K, be collected, bagged, and disposed of or destroyed; seeds will mature and germinate if <br /> L ' / '� left on the ground. Fire effects are unknown.Vegetation may not carry fire. Low severity <br /> i• � prescribed fires may only kill the above ground vegetation, leaving roots and seeds <br /> I ph„.�t unaffected.High severity prescribed fire may kill common teasel,but could damage native <br /> Q species and is not recommended. <br /> CHEMICAL CONTROL METHODS <br /> O NOTE: The following are recommendations for herbicides that can be applied to pastures and rangeland. Rates are <br /> approximate and based on equipment with an output of 30 gal/acre. Follow the label for exact rates.Always read, <br /> n understand,and follow the label directions.The herbicide label is the LAW! <br /> `IVJJ HERBICIDE RATE APPLICATION TIMING <br /> Metsulfuron(Escort 1 oz.product/acre+0.25%v/v Apply when in rosette or bolting growth stage.(Spring or fall rosettes, <br /> XP) non-ionic surfactant or early summer bolting) <br /> Aminopyralid 4-7 oz.product/acre(start with Apply when in rosette or bolting growth stage.Best choice of herbicide <br /> (Milestone)* 7 oz.)+0.25%v/v non-ionic to use in riparian areas.(Spring or fall rosettes,or early summer bolting) <br /> surfactant *Not permitted for use in the San Luis Valley. <br /> Imazapic(Plateau) 8-12 oz.product/acre+2 pints/ Apply when in rosette or bolting growth stage.Good choice of herbicide <br /> acre methylated seed oil to use in riparian areas.(Spring or fall rosettes,or early summer bolting) <br /> Aminocyclopyrachlor 4.75-8 oz.product/acre+0.25% Apply from the seedling to the bolting stage. IMPORTANT:Applications <br /> +chlorsulfuron v/v non-ionic surfactant greater than 5.5 oz.product/acre exceeds the threshold for selectivity. <br /> (Perspective)* DO NOT treat in the root zone of desirable trees and shrubs.Not for use <br /> on grazed or feed forage.*Product not permitted for use in the San Luis <br /> Valley. <br /> Colorado Department of Agriculture-Conservation Services <br /> 305 Interlocken Parkway <br /> Broomfield,CO 8002t <br /> Rev. '7 (303)869-9030 <br /> University <br /> 11/16 www.colorado.gov/ag/weeds <br />