herbicide mode of action chart 2021

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Check your inbox or spam folder to confirm your subscription. 12-14) for WSSA mode of action group numbers . Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window), GROW is Hiring a Post-Doctoral Researcher, How a National Image Repository Can Transform Agriculture, The Ag Image Repository: A First Step in Accessible Precision Ag, Weed Science Society of America www.WSSA.net, Take Action Herbicide-Resistance Management. Up and Down arrows will open main level menus and toggle through sub tier links. to as cell membrane disruptors because of their contact activity. As a result, the relative abundances of invertebrate feeding groups may shift. For the best experience on our site, be sure to turn on Javascript in your browser. xmp.iid:a7f9a9db-6be2-41ff-a719-51629254f9c6 Similarly, if you have glyphosate-resistant Palmer amaranth in your field, tank-mixing dicamba (active ingredient in Xtendimax or Engenia herbicide, WSSA group 4) and glyphosate (Roundup, WSSA group 9) only provides one effective mode of action. -- DIN OT Glyphosate DINOT-CondBlack Open all. This website is copyrighted under Creative Commons-Attribution. Belden J, Lydy MJ (2000) Impact of atrazine on organophosphate insecticide toxicity. Herbicide rotation in combination with other integrated weed management strategies is critical to help prolong the utility of herbicides. Herbicides are addressed in this module as proximate stressors. Applied to broad-leafed weeds in corn, small grains, sorghum, pastures and rangeland. Refer to the APVMA website (www.apvma.gov.au) to obtain a complete list of registered products from the PUBCRIS database. of a particular numbered group. These Resistance Management Strategies do not replace product labels. Urban land uses can contribute as homeowners and managers of parks, golf courses and other lawns use herbicides for aesthetic enhancement. Atrazine also increased the effects of other pesticides in mosquito larvae and various flies (Belden and Lydy 2000, Lydy and Linck 2003). Adapted from Ross and Childs (1996) and USDA; commercial names in italics. 0 This chart groups herbicides by their modes of action to assist you in selecting herbicides 1) to maintain greater diversity in herbicide use and 2) to rotate among herbicides with different sites of action to delay the development of herbicide resistance. %PDF-1.3 % Herbicide metabolites can have toxicity similar to that of the parent herbicide and are often found in higher concentrations (USGS 2010). The bioavailability, uptake, and toxicity of herbicides and their metabolites during these exposures depends on factors such as temperature, pH, and dissolved oxygen concentrations. Currently there are over 20 sites of action. This means that one mode of action may be associated with multiple sites of action. Applied to the foliage and transported with sugars to metabolic sites where they inhibit amino acid production. Click on diagram to enlarge.Consider listing herbicides as a candidate cause when the following sources and activities, site evidence and biological effects are present: You also may wish to consider other causes with similar evidence: Forestry management practices, agricultural operations, and urban development and maintenance are all sources of herbicides that may enter surface waters and cause impairments. The application method used, whether preplant incorporated, preemergence, or postemergence, determines whether the herbicide will contact germinating . Photography of Herbicide Effects on Plants. preplant incorporated or preemergence in a wide range of agronomic crops, vegetables, HW}W#0_eilGE H.-@9-%-Y:?^.uo_}=ksvSgdlG,.bNv_, 55620-1_TA_HRM_ClassificationPoster_FNL.indd. For example, aquatic vegetation is especially susceptible to herbicides, so may decrease in abundance and richness. 0000034436 00000 n Herbicides that share similar structures are said to be in the same chemical family. Should I Buy (or Retain) Stockers to Graze Wheat Pasture? PPO inhibitors may also be referred to as cell membrane disruptors and are usually 78058445 important to know that the type of salt formulation does not affect weed control, Nerve & Muscle Most current insecticides act on nerve and muscle targets. / uses for preplant and in-season weed control in broadleaf crops. Echinochloa crus-galli (L.) P. Beauv (common name: barnyard grass) is a major weed in rice-growing areas and has evolved resistance to multiple herbicides. Herbicide mode of action and injury symptoms. Inhibition of acetyl co-enzyme A carboxylase (ACCase inhibitors), Inhibition of acetolactate synthase (ALS inhibitors), acetohydroxyacid synthase (AHAS), * This product contains more than one active constituent, Disruptors of plant cell growth (Auxin mimics), Inhibition of photosynthesis at photosystem II D1 Serine 264 binders (and other non-histidine binders) (PS II Serine 264 inhibitors), Inhibition of photosynthesis at photosystem II D1 Histadine 215 binders, Inhibition of 5-enolpyruvyl shikimate-3 phosphate synthase (EPSP inhibition), Inhibition of carotenoid biosynthesis at the phytoene desaturase step (PDS inhibitors), Inhibition of deoxy-D-xyulose phosphate synthase (DOXP inhibitors), Inhibition of protoporphyrinogen oxidase (PPO inhibitors), Inhibition of very long chain fatty acid synthesis (VLCFA inhibitors), Inhibition of photosynthesis at photosystem I via electron diversion (PSI electron diversion), Inhibition of 4-hydroxyphenyl-pyruvate dioxygenase (HPPD inhibitors), Inhibition of serine-threonine protein phosphatase (STPP inhibitors), Inhibition of solanesyl diphosphate synthase, * This product contains more than one active constituent, URL: https://croplife.org.au/resources/programs/resistance-management/herbicide-moa-table-4-draft-2/ chemical families within the ALS inhibitors. DINOT-Black trailer particularly atrazine and metribuzin. 1997). Applied to crops such as corn, soybeans and sorghum, particularly for conservation tillage. These herbicides are also called bleachers because of the characteristic white plant The left half of the chart classifies herbicides first by their mode of action (MOA) and then further classifies them by site of action (SOA). Herbicides should be a candidate cause when human sources and activities, site observations or observed effects support portions of the causal pathways (see Figure 2). DINOT-Bold How can I Determine the Herbicides Mode of Action? The information given in this strategy is provided in good faith and without any liability for loss or damage suffered as a result of its application and use. of Resistant Weed Species in U.S. Chemical . Increased herbicides in streams can adversely affect stream flora and fauna via several mechanisms, including reduced growth, condition, and reproduction; increased mortality; and changes in behavior. The surfactants used in herbicide solutions also can be toxic to biota and are not considered when testing active ingredients (Folmar et al. Diuron (CAS 330-54-1) is a selective urea herbicide, developed by DuPont, which has a systemic mode of action, being mainly absorbed through the roots (Tomlin 1994). Why is it Important to Know the Mode of Action? 0000091810 00000 n a successful weed management program for your production system. Herbicide is generally not systemic, but in some susceptible species young plants (e.g. resulting in herbicides that are no longer effective for weed control. Sample page from the publication, "Herbicide Mode of Action", that discusses herbicide categories. 10177 2-Amino-4-Methoxy, Herbicide Safety Relative to Common Targets in Plants and Mammals, United States Patent (19) 11 Patent Number: 5,885,933 Fenderson Et Al, Date This Page Issued: 2/19/2020 Herbicides 52 READ the LABEL, Pesticides in Wyoming Groundwater, 200810, Herbicide Resistance Mode of Action Groups, Weed Control with Glyphosate Tank Mixed with Dicamba and [Dicamba & SAN 1269] in Glyphosate- Resistant Corn at Lamberton, MN in 2003, Effects of Conservation Practices on Mitigation of Pesticide Loss And, Oak Leaf Tatters a Chemical Connection? This herbicide is applied to the soil to control target vegetation by inhibiting or disrupting cell division in shoots. 3471242601 to include, it is also important to know and understand the herbicides mode of action Growth Insect development is controlled by juvenile hormone and ecdysone, by directly perturbing cuticle formation/deposition or lipid . The overuse of herbicides, just like other pesticides such as insecticides, has led to increased development of resistance . Figure 3. Some herbicides will list the mode of action somewhere in the general used, and each is unique in the way it controls susceptible plants. Herbicides from very different chemical families may have the same mechanism of action. Simply rotating jfalkjones@ksu.edu, Tags: 29798 2017-01-18T11:33-06:00 As a result, if a weed is resistant to a specific herbicide SOA it is effectively controlled by other herbicides with a different SOA. The conceptual diagram and other information also may be useful in Step 3: Evaluate Data from the Case. 0000126372 00000 n Such urban and suburban uses are likely to contaminate storm waters. hb``pf``?*`cHPA*AC[H9`{/e;)tQHuISO2\Q!Gfn Ry$H711=r9#Rn:y/niF 20 74 The only herbicide included in this mode of action is glyphosate. In some cases, herbicides may be transported atmospherically in spray drift. This database has toxicity data for pesticides across many species. These herbicides are applied to the soil to control target vegetation before emergence by inhibiting root growth. Herbicides may be applied to golf courses, lawns and other managed landscapes, forests, crop fields and orchards to control a variety of unwanted vegetation. 0000004057 00000 n Merriweather Amino Acid Synthesis Inhibitors. In other situations, products may Several of the pigment Herbicide Poster - Herbicide Resistance Action Committee HRAC has produced a poster of herbicide structures grouped by their mode of action. The global MoA classification system is based on numerical codes which provides infinite capacity to accommodate new herbicide . 2000). weeds. Knowing and understanding each herbicides mode of action is an important step in hormone-type herbicides in wheat, corn, sorghum, and pasture settings. Example of a detailed conceptual diagram related to herbicides. on a weed population and may eventually select for resistant individuals. 835561466 Combating herbicide resistance relies on understanding herbicide Sites of Action (SOA). Explore WSSA's recent fact sheet to find out why updates were needed and what changes are being made. 55620-1_TA_HRM_ClassificationPoster_FNL.indd site that is affected by the herbicide. Acute and chronic benchmarks are provided for fish, invertebrates and aquatic plants. Irrigation ditches and row crop farming near streams provide opportunities for herbicides to enter streams . Actives are allocated to specific groups based on their target site. Group 2 herbicides inhibit the enzyme acetolactate synthase (ALS), while Group 9 herbicide (glyphosate) inhibits the enzyme enolpyruvyl shikimate-3-phosphate synthase (EPSPS). Herbicide manufacturers, industrial facilities and wastewater treatment plants may discharge effluents containing herbicides. Important herbicide sites of action and their corresponding herbicide group numbers are listed below (Table 1). 2577315893 If you are unsure of the herbicides Repeated use of herbicides with the same site of action can result in the development of herbicide . Glufosinate can 0000003549 00000 n Kreutzweiser DP, Capell SS, Sousa BC (1995) Hexazinone effects on stream periphyton and invertebrate communities. 2017-01-18T11:33-06:00 Australia Herbicide Classification Lookup Search by Active Ingredient Mode of Action Mode of Action Groups Inhibition of Acetyl CoA Carboxylase [Group: 1] Clodinafop-propargyl A Legacy AUS 1 NEW AUS HRAC (Chemical Family: Aryloxyphenoxy-propionates (FOPs)) Cyhalofop-butyl A Legacy AUS 1 NEW AUS HRAC based on their site of action. 0000089943 00000 n The strategies are a useful tool that supports farmers adoption of resistance management. Pesticide Science 53(1):21-28. Herbicide mode of action is a term that generally describes the plant process (e.g., photosynthesis) or enzyme (e.g., ALS) that is disrupted by the herbicide. Archives of Environmental Contamination and Toxicology 8:269-278. False 0000096757 00000 n The way in which a herbicide kills weeds is called its mode of action. 0000206910 00000 n 1993 to document.write(new Date().getFullYear()) Curators of the University of Missouri, all rights reserved, DMCA and other copyright information. It further subdivides the information into chemical type and then common and trade names. 1979). 7.504 Site of Action Group* Site of Action No. We identified a florpyrauxifen . not mention the mode of action anywhere in the label. -- Helvetica Herbicides may cause biological impairments of water bodies if they occur in water or sediment at sufficient concentrations. herbicide use and 2) to rotate among herbicides with different sites of action to delay the development of herbicide resistance. OpenType - PS the resistant individuals will multiply and become the dominant weeds in the field, Is herbicide Mode of Action the same as Site of Action? Atrazine injury in cotton from a preemergence application. [10] The cellulose biosynthesis inhibitors (CBIs) are identified as Class 29 by the Weed Science Society of America / Herbicide Resistance Action Committee. -- 0000126467 00000 n Atrazine reacts synergistically with chlorpyrifos: the mixture was seven times more toxic to an earthworm species than the two individual pesticides (Lydy and Linck 2003). Herbicide classification and chemistry. This list is intended to guide you in collecting evidence to support, weaken or eliminate herbicides as a candidate cause. All previous versions of this strategy are now invalid. Weed control basics for preemergence and postemergence herbicide principles in fruit tree crops. Herbicides with This Mode of Action: Atrazine, diuron*, fluometuron* (Cotoran), metribuzin (Sencor), bentazon (Basagran), bromoxynil (Buctril), prometryn* (Caparol), simazine (Princep) *Indicates herbicide labeled for use in cotton. 0 The aquatic life benchmarks (for freshwater species) provided in this module are based on toxicity values reviewed by U.S. EPA and used in the Agency's most recent risk assessments, developed as part of the decision-making process for pesticide (including herbicides) registration. Applied primarily to genetically engineered, glyphosate-resistant varieties of soybeans, corn, canola and cotton. application/pdf The site of action is a more precise description Herbicide site of action refers to the specific biochemical or biophysical process in the plant that the herbicide disrupts to interfere with plant growth and development processes. 0 Mode of action Group 14. are cross-resistant to both Scepter (chemical family: imidazolinone) and Classic (chemical Many herbicides in this mode of action fall into two chemical families: @QAAFI scientists have mapped the Hass avocados genome to understand why it is exceptional in tas https://t.co/C0lsj67gwG, Level 1 Maddocks House40 Macquarie Street,Barton ACT 2600, Herbicide Resistance Management Strategies, clodinafop (Topik), cyhalofop (Agixa*, Barnstorm), diclofop (Cheetah Gold* Decision*, Hoegrass), fenoxaprop (Cheetah, Gold*, Wildcat), fluazifop (Fusilade), haloxyfop (Verdict), propaquizafop (Shogun), quizalofop (Targa), butroxydim (Factor*), clethodim (Select), profoxydim (Aura), sethoxydim (Cheetah Gold*, Decision*), tralkoxydim (Achieve), imazamox (Intervix*, Raptor), imazapic (Bobcat I-Maxx*, Flame, Midas*, OnDuty*), imazapyr (Arsenal Xpress*, Intervix*, Lightning*, Midas* OnDuty*), imazethapyr (Lightning*, Spinnaker), bispyribac (Nominee), pyrithiobac (Staple), azimsulfuron (Gulliver), bensulfuron (Londax), chlorsulfuron (Glean), ethoxysulfuron (Hero), foramsulfuron (Tribute), halosulfuron (Sempra), iodosulfuron (Hussar), mesosulfuron (Atlantis), metsulfuron (Ally, Harmony* M, Stinger*, Trounce*, Ultimate Brushweed* Herbicide), prosulfuron (Casper*), rimsulfuron (Titus), sulfometuron (Oust, Eucmix Pre Plant*, Trimac Plus*), sulfosulfuron (Monza), thifensulfuron (Harmony* M), triasulfuron (Logran, Logran B-Power*), tribenuron (Express), trifloxysulfuron (Envoke, Krismat*), florasulam (Crest*, Gangster*, Paradigm*, Vortex*, XPand*), flumetsulam (Broadstrike, Thistrol Gold*), metosulam (Eclipse), oryzalin (Rout*, Surflan), pendimethalin (Freehand*, Stomp), prodiamine (Barricade), trifluralin (Bolta Duo*, Jetti Duo*, Treflan), dicamba (Banvel, Banvel M*, Barrel*, Casper*, Lawnweeder plus*, Lawn weedkiller*, Mecoban, Methar Tri-Kombi*, Nuturf Millennium*, Sandoban*), 2,4-D (Actril DS*, Amicide, Fallow Boss Tordon*, Methar Tri-Kombi*, Pyresta*, Vortex*), 2,4-DB (Trifolamine), dichlorprop (Lantana 600), MCPA (Agtryne MA*, Banvel M*, Barrel*, Basagran M60*, BuctrilMA*, Buffalo Pro Weedkiller*, Condor*, Flight*, Lawnweeder plus*, Lawn Weedkiller*, Midas*, Paragon*, Precept*, Quadrant*, Silverado*, Spearhead*, Thistrol Gold*, Tigrex*, Tordon242*, Triathlon*), MCPB (Legumine, Thistrol Gold*), mecoprop (Mecoban, Mecopropamine, MetharTriKombi*, Multiweed*). These numbers refer to a specific mode of action 2019 NORTH CAROLINA SOYBEAN PRODUCERS ASSOCIATION, NC Soy puts out RFP for NC Commodities Conference Meeting Planner, Congratulations to the 2022 Yield Contest Winners. It involves the study of all the tools available for this purpose such as cropping systems, herbicides, management techniques and seed genetics. Figure 5. to design a successful weed management program. 1979), More sensitive response to Roundup at elevated temperatures and at pH as it rises from 6.5 to 7.5, with no increased sensitivity at pH beyond 7.5 (Folmar et al. In streams, herbicides may be dissolved in the water column or bound to sediments, and their impact depends on the medium in which they occur. of the herbicides activity; however, the terms site of action and mode of action Help improve lives, communities and economies throughout the state. Application methods include spraying onto foliage, applying to soils and applying directly to aquatic systems. xmp.id:d0523843-3350-414f-8324-eb1e217e3231 0000124251 00000 n 0000124005 00000 n Herbicides can act by inhibiting cell division, photosynthesis or amino acid production or by mimicking natural plant growth hormones, causing deformities (Ross and Childs 1996). 0000106262 00000 n 0000092176 00000 n Herbicide Mode of Action. Official websites use .gov These time-lapse photography videos show the effects of various herbicides on plants. The IRAC Mode of Action (MoA) classification provides growers, advisors, extension staff, consultants and crop protection professionals with a guide to the selection of acaricides or insecticides for use in an effective and sustainable acaricide or insecticide resistance management (IRM) strategy. For that use, the rate of application may be high and exposed streams are more likely to be of higher quality than agricultural or urban streams. 0000101464 00000 n The letters refer to P = host defense inducers, M = multi-site inhibitors, and U = unknown mode of action and unknown resistance risk. Additional Information Author Joe Neal High concentrations of herbicides and their metabolites in streams can have lethal and sub-lethal effects on aquatic biota, potentially changing community structure and ecosystem function. 0000019384 00000 n Content last updated: June 30, 2022. 0000004985 00000 n DIN OT Figure 1 and Table 1 present the ten herbicides most used on agricultural land in the U.S. Glyphosate and atrazine were applied to more than double the crop field acreage than the third leading herbicide, 2,4-D, in 2001. Information regarding each products mode of action can sometimes be found on the however, glyphosate and ALS inhibitors control susceptible plants in completely different 0 Possible changes in behavior include increased invertebrate drift and increased avoidance by fish. Anyone may join or leave the Wisconsin Crop Manager email list by sending a blank email with any subject line to:. Email. 1899308463 All crop protection products must be handled and applied strictly as specified on the product label or APVMA permits. The potential effects of herbicides are strongly influenced by their toxic mode of action and their method of application. -- Th Herbicide Classification Chart helps farmers, crop consultants, and the ag-retailer industry to understand Site of Action across many commonly used herbicides and improve herbicide rotation. The site of action is a specific subset of the herbicide mode of action. are generally selective for broadleaf control in grass crops; however, there are some Use our feedback form for questions or comments about this publication. Sign up to receive timely updates and useful information from the North Carolina Soybean Producers Association, including information on results of the investments the association makes in production research to help improve yields in North Carolina conditions; international marketing activities; projects to support our biggest customer, Animal Agriculture; and much more! This chart lists premix herbicides alphabetically by their trade names so you can identify the premix's component herbicides and their respective site of action groups. Sarah Lancaster, Extension Weed Science Specialist Exposure to herbicides also can directly increase mortality and change the behavior and reproduction of fish, amphibians and invertebrates. This is not meant to be a comprehensive bibliography of references dealing with herbicides, but rather is meant to highlight a few references that may be especially useful. The mode-of-action is the overall manner in which a herbicide affects a plant at the tissue or cellular level. 2835246409 0000175586 00000 n Applying herbicides. However, it can be used selectively in Refer to the Site-of-Action chart on the left for more information. The term herbicide mode of action is sometimes used interchangeably with herbicide site of action or herbicide mechanism of action. Within a mode of action, herbicides may also be grouped by their chemical structures. are often used interchangeably to describe different groups of herbicides. Diamond GL, Durkin PR (1997) Effects of Surfactants on the Toxicity of Glyphosate, with Specific Reference to RODEO. Daam MA, Van den Brink PJ (2007) Effects of Chlopyrifos, Carbendazim, and Linuron on the ecology of a small indoor aquatic microcosm. Adobe InDesign CC 2015 (Macintosh) have not emerged from the soil surface. DIN OT Depending on the product, glyphosate can be formulated as ammonium, diammonium, dimethylammonium, isopropylamine, and/or potassium salts. are also some products labeled for use in grass crops to control specific grass weeds. PDF/X-1:2001 2010). This mode of action, also known as synthetic auxins, includes many commonly used plant Find guidance on how to effectively use herbicides for Minnesota crop production. In addition to knowing the crops in which a herbicide can be 7.504 However, a review by the U.S. EPA found that evidence for such effects in amphibians was weak and inconsistent (U.S. EPA 2007). USGS (2010) Glyphosate herbicide found in many midwestern streams, antibiotics not common. 2017-01-18T11:32:42-06:00 Additionally, if abundant, healthy and diverse periphyton and macrophytes are observed in a stream (see Figure 5) it is unlikely that herbicides are responsible for the impairment. table (found on the inside pages) is not exhaustive and does not account for herbicide 0 Calendar designed to guide producers and agriculture professionals to manage alfalfa insect and disease problems. This publication, C715 - Herbicide Mode of Action, provides an in-depth description of how herbicides work to control weeds. For a high resolution PDF of the Poster Click Here For a detailed view of each group select the group from the dropdown menu. Often, the herbicide is described as being a member 0000108351 00000 n Figure 4. glyphosate and glyphosate-containing products available. These herbicides generally control grass There are 13 Mode of Action classes. This is often at an enzyme within a plant cell. Figure 1. Evidence of the presence of herbicides at toxic levels includes dead, deformed, chlorotic or necrotic plants, or the absence of plants from a waterbody or the riparian zone (see Figure 4). Photosynthesis Inhibitors (Photosystem II), Table 7. 0000161846 00000 n plants. This chart groups herbicides by their modes of action to assist you in selecting by PREMIX herbicides 1) to maintain greater diversity in herbicide use and 2) to rotate among effective herbicides with different sites of action to delay the development of herbicide resistance. These herbicides inhibit Photosystem II, part of the photosynthesis pathway, and are There are currently 515 unique cases (species x site of action) of herbicide resistant weeds globally, with 267 species (154 dicots and 113 monocots). Herbicides are used in forest management to prepare logged areas for replanting. Potential Nucleic Acid Inhibitors or 17 Non-descript mode of action The right half of the chart lists herbicide premixes and includes their individual herbicides and sites of action (SOA). -- How to use the Herbicide Classification Chart: The Herbicide Classification Chart is an important resource for managing herbicide resistance. To be effective, herbicides must 1) adequately contact plants; 2) be absorbedby plants; 3) move within the plants to the site of action, without being deactivated; and 4) reach toxic levels at the site of action. DINOT-Cond 0000115094 00000 n herbicide active ingredients is not enough to prevent the development of herbicide-resistant There are many generic Site of Action is the biochemical site within a plant where the herbicide directly interacts. 0000004571 00000 n 0000112732 00000 n Herbicides can also be classified by their site of action, or the specific biochemical 514246571 DIN OT Specific guidelines for Group 04 herbicides; Specific guidelines for Group 31 Herbicides; Specific guidelines for Group 03 herbicides; Sorghum, Maize, Summer Grain Legumes - Heliothis/Cotton bollworm/Native budworm (Helicoverpa spp.) They are a guide only and do not endorse particular products, groups of products or cultural methods in terms of their performance. uuid:5ca0d408-f831-8c4b-9fde-e8ceeda44aef The site navigation utilizes arrow, enter, escape, and space bar key commands. photosynthesis, amino acid synthesis. For example, Herbicide Groups 2 and 9 are both Amino Acid Synthesis Inhibitors, which means their MOA is to shut down amino acids necessary for protein synthesis and ultimately plant growth. 78058445 Premixes on this chart are some of the more common brand names. You can print this poster in large format for the wall. Tab will move on to the next part of the site rather than go through menu items. xref xmp.did:5972fdbc-bd87-422d-897d-6fce396ad285 The molecular site of action is challenging to predict because structural associations have not been identified (Duke 1990), but modes of action are well-established. This publication provides herbicide mode of action, group number, site of action, chemical family, active ingredient, and example trade names for herbicides currently registered in Wisconsin.

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