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2017 Weed Control-Pasture and Range-SDSU

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2017 Weed Control-Pasture and Range-SDSU iGrow.org 2017 Weed Control Pasture and Range Paul O. Johnson | SDSU Extension Weed Science Coordinator David Vos | SDSU Ag Research Manager Jill Alms | SDSU Ag Research Manager Leon J. Wrage | SDSU Distinguished Professor Emeritus Department of Agronomy, Horticulture and Plant Science College of Agriculture & Biological Sciences | agronomy Table of Contents Accurate (metsulfuron) . 13 Latigo (dicamba+2,4-D) . 5 Amber (triasulfuron) . 14 Milestone (aminopyralid) . 8 Banvel (dicamba) . 4 Opensight (aminopyralid+metsulfuron) . 9 Brash (dicamba+2,4-D) . 5 Overdrive (dicamba+diflufenzopyr) . 6 Brush-Rhap (dicamba+2,4-D) . 5 Paraquat (paraquat) . 17 Capstone (aminopyralid+triclopyr) . 10 Para-Shot (paraquat) . 17 Chaparral (aminopyralid+metsulfuron) . 9 Parazone (paraquat) . 17 Chisum (metsulfuron+chlorsulfuron) . 13 PastureGard HL (triclopyr+fluroxypyr) . 11 Cimarron Max (metsulfuron+dicamba + 2,4-D) . 13 Plateau (imazapic) . 12, 16 Cimarron Plus (metsulfuron+chlorsulfuron) . 13 QuinStar (quinclorac) . 15 Cimarron Xtra (metsulfuron+chlorsulfuron) . 14 RangeStar (dicamba+2,4-D) . 5 Clarity (dicamba) . 4 Rave (triasulfuron+dicamba) . .15 Clash (dicamba) . 4 Remedy Ultra (triclopyr) . .11 Clean Slate (clopyralid) . 10 Rifle (dicamba) . 4 Comet (fluroxypyr) . 11 Rifle-D(dicamba+2,4-D) . 5 Commando (clopyralid+2,4-D) . 10 Scorch (dicamba+2,4-D+fluroxypyr) . 6 Crossbow, Crossbow L (triclopyr+2,4-D) . 11 Spike (tebuthiuron) . 15 Crossroad (triclopyr+2,4-D) . 11 Spur (clopyralid) . 10 Curtail (clopyralid+2,4-D) . 10 Sterling Blue (dicamba) . 4 Cutback (clopyralid+2,4-D) . 10. Surmount (picloram+fluroxypyr) . 8 Cyclone (paraquat) . 17 Stinger (clopyralid) . 10 Detail (saflufenacil) . 12 Telar (chlorsulfuron) . 14 Detonate (dicamba) . 4 Tie Down (triasulfuron+dicamba) . 15 Devour (paraquat) . 17 Tordon (picloram) . 6 Diablo (dicamba) . 4 Transline (clopyralid) . 10 Engenia (dicamba) . 4 Triumph (picloram) . 6 Escort (metsulfuron) . 13 Trooper (picloram) . 6 E-2 (dicamba+2,4-D+fluroxypyr) . 6 Trooper P+D (picloram+2,4-D) . 7 Fexapan (dicamba) . 4 2,4-D ester . 3 ForeFront HL (aminopyralid+2,4-D) . 9 2,4-D amine . 3, 16 Freelexx (2,4-D choline) . 4 Velpar (hexazinone) . 16 Glyphosate products . 17 Vision (dicamba) . 4 Gramoxone SL (paraquat) . 17 Vista XRT (fluroxypyr) . 11 Graslan L (picloram+2,4-D) . 7 Weedmaster (dicamba+2,4-D) . 5 GrazonNext HL (aminopyralid+2,4-D) . 9 Xtendimax (dicamba) . 4 Grazon P+D (picloram+2,4-D) . 7 Gunslinger (picloram+2,4-D) . 7 Weed Response Table . 21 Helmquat (paraquat) . 17 Special Weed Problems . 19 Imazapic 2SL (imazapic) . 12, 16 Summary Grazing & Haying Restrictions . 22 Spot Treatment of Noxious Weeds . 24 Page iii © 2017, South Dakota Board of Regents | agronomy Safety First Follow the Label. It is a violation of federal pesticide laws to use an herbicide in a manner inconsistent with its labeling . Read the entire label before using . Applicator Safety. The most serious risk of exposure from chemicals is during handling and mixing operations with the concentrated product . Use protective equipment specified on the label . Use chemical resistant gloves, eye shield, long- sleeved clothing, rubber boots, and appropriate respirator as required . Poison Control Center 1-800-222-1222 Water Protection. Preventing spills and accidents during handling and mixing reduces risk of groundwater and surface water contamination . Mix herbicides away from wells and water sources . Prevent back- siphoning into wells . Install anti-backflow devices in irrigation equipment used for pesticides . Triple rinse containers . Store herbicides properly . Identify high-risk areas, such as coarse soils or areas where the water table is near the surface . Be aware of herbicide properties that increase the risk of contamination . ABBREVIATIONS: Several abbreviations are used in this publication. ae=acid equivalent MSO=methylated seed oil ai=active ingredient NIS=non-ionic surfactant COC=crop oil concentrate oz=ounces DF=dry flowable P=pellet gal=gallon pt=pint gpa=gallons per acre qt=quart L=liquid T=tablespoon lb=pound t=teaspoon ml=milliliter WDG=water soluble powder or crystals Page iv © 2017, South Dakota Board of Regents Agronomy iGrow.org SDSU DEPARTMENT OF OCTOBER 2017 AGRONOMY, HORTICULTURE AND PLANT SCIENCE 2017 Weed Control: Pasture and Range Paul O. Johnson | SDSU Extension Weed Science Coordinator David Vos | SDSU Ag Research Manager Jill Alms | SDSU Ag Research Manager Leon J. Wrage | SDSU Distinguished Professor Emeritus There are 24 million acres of native and tame pasture several products . The common name (in parentheses) and range as well as 1 .4 million acres of grass hayland follows the first listing of the tradename . Product labels in South Dakota . Many herbaceous and woody plants for the same active ingredient may vary . Consult the are present in these grasslands . Forbs add to the label of the product being used . productivity and are desirable . Some may be desirable when found in sparse stands, but become undesirable Rates. Rates for each treatment and each formulation in heavier stands . Invasive plant species alter the are stated as the amount of product per acre . The grass species mix and reduce production of palatable amount of active ingredient (ai) or acid equivalent (ae) forage . Undesirable plants reduce the quality of animal is also listed for each treatment . products and still others may be poisonous to livestock . Cost. The cost per acre for low and high rates is listed . Vigorous grass plants are good weed competitors . Prices do not consider special marketing programs . Herbicides are an aid to recommended grazing or Consult your dealer/distributer for actual prices . haying practices . Quality seed, proper seedbed, and good planting techniques will reduce weed problems in Time to Apply. Most herbicides for pasture and range new grass seedings . are applied when weeds and grass are growing . The optimum growth stage for control of specific weeds is Herbicide Suggestions listed in sections of this publication . Herbicides are included only after the chemical is registered by the Environmental Protection Agency Noxious Weed Treatments (EPA) as to residue tolerances in crops used for food or Noxious weeds are found in range and pasture as feed . This fact sheet provides a summary of herbicide well as noncrop areas and cropland . Troublesome uses and does not imply a guarantee . Consider the statewide noxious weeds like Canada thistle, leafy label to be the final guide . Tradenames are for reader spurge, perennial sow thistle, Russian knapweed, convenience . Users are responsible for following label and hoary cress can be serious problems in pasture directions and precautions . and rangeland . Locally noxious weeds like biennial thistle (musk, plumeless, bull and Scotch) and absinth Weed Control. Information is based on Agricultural wormwood are a major concern in pasture and range Experiment Station data, other research and across the state . Locally noxious weeds that can be a observations in South Dakota . Ratings are based on problem in pasture and range in certain areas of South performance using recommended rates and application Dakota include: common mullein, biennial knapweeds, at proper weed stage and satisfactory growing tansy, St . Johnswort, dalmatian and yellow toadflax, conditions . Herbicide performance is better if the grass and burdock . This guide includes treatments for stand is full and vigorous . many of these weeds . For a more complete listing of Herbicides. Most herbicides are listed by tradename herbicide recommendations refer to SDSU Fact Sheet, except where the active ingredient is available in “Noxious Weed Control” . Page 1 © 2017, South Dakota Board of Regents | agronomy Pasture and Range IPM the host plant . Insects have been the most common An effective weed control plan for pasture and range approach to biological control in South Dakota . Noxious involves several management practices . The grazing weeds that have approved biological control agents scheme takes into account the type of livestock (insects) in the state include leafy spurge, musk thistle, as well as the grass and forb species available . Canada thistle, toadflax, St . Johnswort, and biennial Grazing intensity influences the relative abundance knapweeds . South Dakota currently has a collection of undesirable forbs and grasses . Weeds that are and release program for leafy spurge flea beetles unpalatable when mature may provide acceptable (Aphthona species), coordinated by the South Dakota grazing for certain classes of livestock when weeds Department of Agriculture . The county weed and pest are young . Grazing schedules are a good IPM practice board is the local contact point for landowners and for weed management . Cultural or mechanical weed managers considering the use of flea beetles on leafy management includes mowing or clipping, hand spurge . digging, prescribed burning, or cultivation . Other IPM Herbicide options are available to control many of the tactics include biological control, especially for noxious undesirable plants found in pasture and range . Many of weeds . Herbicides are an aid to control unwanted these treatments, especially those targeting broadleaf weeds . weeds, will also remove all or many of the desirable Mowing or clipping temporarily removes weed forbs or legumes . Reducing or eliminating beneficial topgrowth but also removes topgrowth from grass . forbs can reduce livestock gains and alter the forage This system stops seed production but has different mix
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