be applied in late May or early June as flower buds (8 to 12 2,4-D Amine Selective Post-Emergent Herbicide. Emergence: Seedlings produced from seeds emerge from soil depths of 1/4- to 1/2-inch. needed several consecutive years for complete control. (September and early October). stems. which favor rapid closure of crop canopies (good stands, adequate Users should follow recropping recommendations very carefully to avoid damage to pulse crops and legume forages. HERBICIDE CONTROL OF INVASIVE CANADA THISTLE. Corn -- A clopyralid and flumetsulam combination seed and vegetatively by creeping roots. and take on perennial characteristics after about two months. 2,4-D mixed with dicamba is also an effective option, but should be sprayed when temperatures are … These herbicides are used to selectively remove or suppress Get all the latest information on Solutions products,deals, and events. oz.) control Canada thistle can be improved when preceded by two or three mow¬ings. This requires patience, vigilance and use of chemical herbicide. severe damage to established plants stimulate new growth from It begins sprouting in mid-April to early May in the northern US, flowering mid-June to early July. We recommend using 2,4-D Amine Selective Weed Killer to treat Canada Thistle. Life Cycle: Perennial. Once you have made your measurements and calculated how much 2,4-D you need, mix the product and surfactant with the appropriate amount of water in a handheld or backpack sprayer. West Lafayette, IN 47907. According to the 2017 Alberta Weed Survey, Canada thistle is the ninth most abundant weed present in annual field crops after post-emergence herbicide application; occurring in 22% of surveyed fields. b NIS = non-ionic surfactant; COC = crop oil concentrate;N = 28% UAN or AMS (ammoniumsulfate). The Canada thistle is a perennial plant that grows wide and sends up new colonies as far as its tough horizontal roots can reach. establishment and other non-cropland only uses), has provided Canada thistle can be treated after heavy frost and light freezes PLANT AND CAUSE SUBSTANTIAL INJURY TO THE CREEPING ROOT SYSTEMS. A problem perennial weed in many cropping systems, Canada thistle, has consistently ranked in the top five weeds in the Canadian Prairies in relative abundance. the tops of Canada thistle in crops which will grow rapidly enough will be more effective than a 2 to 3 qt/acre single dose. provide shoot kill and/or subsequent suppression in a competing It is selective and will kill the plant all the way down to the root. underground buds. buds to depths well below the plow layer. Canada Thistle flowers are also unique because they have both male and female flowers which are very small compared to other thistles. C. FOLIARLY APPLIED HERBICIDES WHICH DO NOT MOVE DOWN will help the product to stick better to the weed and make the herbicide work more effectively. Canada thistle blooms You may also have to control growing points for the chutes that have sprung up above ground at least ten feet away. Plants die after the first killing frost. Monterey Thistledown – Best Herbicide for Canada Thistle. Shake the sprayer to ensure the solution is well-mixed and then you're ready to spray. Misidentification can lead to using the wrong treatment methods, which can end up wasting your time and money. advanced planning and herbicide applications well ahead of crop inch stems) are formed and before flowers open. The standard English name in its native area is creeping thistle. Before you can carry out a treatment plan, you need to both be aware of what Canada Thistle looks like and to confirm whether or not it is the weed you are dealing with. Curtail™ M is a proven in-crop herbicide with control of Canada thistle in cereals, flax and canary seed. Grass sods PRAMITOL P, and imazapyr ARSENAL. Insect biocontrol agents have been released on both musk thistle and Canada thistle with limited success. Identification of thistles can be challenging. Fertilize your lawn so it doesn’t have a deficiency. High cost of chemical root systems can be expected), and 4) long residual herbicides Canada thistle plants which largely account for re-establishment Seeds can survive burial in the soil for 20 years or more. environmental consequences such as soil erosion, damage to nearby The Canada thistle is a broad-leafed weedy plant that invades gardens, orchards, vineyards, and roadsides. Check back weekly and spot treat as necessary. Canada Walk through your property to see where they are concentrated and how severe of an invasion there is. and other non-crop situations. Removal of low growing tree branches Applications Left unchecked, this weed can run rampant across your land. A thick dense lawn that is well-fertilized will be better able to choke out broadleaf plantain weeds and not allow them room to establish. should prove more effective than a single 2 qt application. downwardly mobile herbicides on Canada thistle: If one or more of the above situations is not met, control implement proper cultural practices such as watering, mowing and feeding to make your yard less conducive to Canada thistle making a return and invading your yard. plants which escape can result in reductions of thistle approaching establishment. Not Your Average Thistle The key to Canada thistle's weediness is its root system. Then apply 1 qt/acre of glyphosate ROUNDUP ULTRA (or other Check back weekly and spot treat as necessary. are not competitive in most crops, they provide a source of re-establishment The thistle has not been disturbed recently (within 2 months) Two or more applications at 3 to 12 month intervals will Green leaves, not wilted and generally free from extensive Description and Life Cycle of Canada Thistle: The growth on Canada thistle in late September and October helps QUESTIONS DUE: December 11, 2020 email maranoanna@kaneforest.com sold as HORNET is less costly and next most effective to STINGER if the leaves appear not to be injured. thistle should be retreated when subsequent regrowth reaches 6 fertility and narrower row spacing) maximize the control provided DriFast. which can be appropriate for permanent pastures, bare soil sites Canada thistle (Cirsium arvense (L.) Scop.) BEACON, bentazon BASAGRAN, applied postemergence at doses Prevention is the best and cheapest management option. SELECTIVE TOP REMOVAL (AND SOMETIMES MORE) IN CROPS, THIS IS THE MINIMUM THAT CAN BE DONE TO MEET THE INDIANA site and herbicide chosen should be evaluated for potential harmful Canada Thistle is a creeping perennial and often it is seen in growing in large patches where established. Despite be ing called Canada thistle, it doesn’t actually originate from Canada and can be found across the world. "Most herbicides suppress Canada thistle top growth only but because of the persistent root system, suppressing the top growth is like giving the thistle a haircut. under good growing conditions should allow establishment of perennial of 1 to 1 1/2 qt/acre applied twice (initially and then on regrowth) treatments for any plants growing in the spring. This timing provides the best compromise between Canada thistle emergence and the stage of growth for older plants. Show more. The plant is beneficial for pollinators that rely on nectar. One or more Undisturbed For small applications with a hand sprayer, this breaks down to 0.72 to 1.1 fl. It has now become an invasive species, with its aggressive growing and ability to spread at a rapid rate. JavaScript seems to be disabled in your browser. Canada thistle (synonyms: creeping thistle, Californian thistle, corn thistle) is a patch forming, creeping perennial with prickly, alternate, green leaves that are lance shaped and deeply lobed. It is a non-native invasive species from Europe, and landowners with Canada thistle on their property are obligated to take measures to control it. THROUGH THE PLANT AND THUS RESULT ONLY IN SHOOT KILL OR INHIBITION. 2. Male and female flowers occur on separate plants (dioecious) but are quite similar in appearance. thistle in some conifers. grouped as follows: 1) those applied to the foliage and which Canada thistle can be killed with weed killers. This concentrate formulation gives ultimate control against the persistent thistle herbs during their active growth. thistle than most other agronomic crops grown in Indiana. Mowing, tillage, or herbicide application can alter the normal You must have JavaScript enabled in your browser to utilize the functionality of this website. to 12 inches in height. Embutox. usually limits use of STINGER to spot treatments. result in shoot kill or inhibition (no injury to the creeping The best time to apply the 2,4-D is on warmer days when the temperatures are between 65 and 85 degrees F. Because Canada thistle is so prolific, you may need to do repeated applications until you no longer see any more Canada Thistle. Persistence is imperative so the weed is continually stressed, forcing it to exhaust root nutrient stores and eventually die.Canada thistle (Cir… Use a sprayer on a fan nozzle setting for even coating of the herbicide on the Canada thistle. Canada Thistle is a creeping invasive perennial weed that is very difficult to control. While young seedlings Canada thistle can displace endangered or threatened plant species. The flower heads of Canada thistle (pictured left) are no more than 1 inch tall and more numerous than other thistles. Misidentification can lead to using the wrong treatment methods, which can end up wasting your time and money. Small grains compete less effectively against Canada per 1,000 square feet. Canada thistle is at the correct height about June first (by June When it has matured, the seed will become whitish like Dandelion. Clopyralid STINGER, dicamba BANVEL/CLARITY, 2,4-D, MCPA, or Spray the weeds to wet but just before the point of runoff. Emerges in spring and flowers when days are the longest. Canada thistle, also referred to as Canadian thistle, creeping thistle or field thistle, originated in Europe and was brought over to North America in the 1600s. For turf applications, 2,4-D Amine should be mixed at a rate of 2 to 3.16 pints per acre. When Canada thistle infestations occur in situations where root growth would be restricted, such as habitats with high water tables, begin mowing when it is 12 to 15 Table 1. BASAGRAN, acifluorfen BLAZER or TACKLE, chlorimuron CLASSIC, Executive Office Montana Weed Control Association, Inc. PO Box 315, Twin Bridges, MT 59754 (406) 684-5590 | (888) 664-4153 (fax) in at least 2 gallons of water. Department of Botany thifensulfuron + tribenuron EXPRESS HARMONY EXTRA after wheat crops (turf, pastures, Christmas trees, and nurseries) almost This approach requires Choose a turfgrass that is dense and can prevent the development of weeds. We recommend 2 4-D Amine Herbicide to treat Canada thistle. ... is showing particular promise in suppressing Canada thistle. Canada Thistle is a lighter colored green, deeply lobed, leaves which are prickly looking and resemble spears. The seeds of this broadleaf perennial can go dormant for up to 20 years 2, but only about 10% of Canada thistle is spread through seed 1. two or more times a year in conjunction with a competitive crop. ROOT SYSTEMS. of glyphosate ROUNDUP 1 1/2 qt per acre directed underneath foliage Legal status: Canada thistle is considered a noxious weed in 46 states including Indiana. Doses of imazapic PLATEAU (8 to 12 oz/acre) that control thistle to 18 inches tall should be made in late spring or on fall regrowth. Plant glyphosate resistant ROUNDUP READY soybeans. herbicides). by tillage. Begin by calculating the square footage (length x width = square footage) of the treatment area to determine how much 2,4-D Amine you will need. Roundup should not be applied to green or freshly injured move down through the plant causing partial (and variable) injury Wheat (Wheat is much less competitive with Canada thistle present. IS DESIRED. and thistle when Canada thistle reaches six or more inches tall. When maturing, Canada Thistle produces these small light fluffy seeds which can blow off and disperse, similar to Dandelion, as much of the seed tends to just drop right where the parent plant is. (e.g. proximity to patches with female flowers. are formed and before flowers open and a second on Canada Thistle is a common invasive plant found in a wide range of areas, especially in the upper mid-west of the United States like in Indiana and Wisconsin. of Canada thistle will be reduced. Canada thistle spreads both by seeds and by budding from underground roots. Thistle can be expected to re-grow and recover in If herbicide must be avoided, it may be possible to exhaust the root system of Canada thistle using a combination of mechanical methods such as mowing, digging, and grazing. June. If they grow enough to flower, the flower is a purple pom-pom shape that will be produced in small clusters at the top of the plant. after the first flower buds are formed and before the first flowers Removal of shoots and Cost of treatment limits the use to The best time to treat Canada thistle with foliarly applied An effective control program must include treatments Fall burn down is necessary prior to a hard frost, when regrowth is 8-12 inches tall and soil moisture is good. It is difficult to control because its extensive root system allows it to recover from control attempts. Seed is produced when patches with male flowers are in close open and/or on fall regrowth during September and early October. If you are having trouble, you can always contact us and our lawn care experts will help to correctly ID your weed growth. damage caused by insects, disease, drought, hard freeze, dormancy Chances are if you have Canada Thistle, they are not hard to miss and they stick out like a sore thumb on your lawn amongst your desired grass and vegetation. lactofen COBRA, or combinations of two herbicides (e.g. Clopyralid STINGER is labeled for selective control of Canada Glyphosate combined with other herbicides can provide good results 2. SELECTIVE CONTROL IN ESTABLISHED TREE CROPS -- Applications restore underground food reserves. TELAR, picloram TORDON, prometon + sodium-chlorate + sodium-metaborate Conditions At least one additional herbicides applied at higher labeled doses include bentazon + acifluorfen or bentazon + imazethapyr PURSUIT). It’s typically seen in a wide range of areas but it tends to thrive more where it is wet. Grass sods for pasture, conservation reserve and ground with one of these herbicides either as prepackaged mixtures (e.g. In rangelands research has shown that Canada thistle control can be achieved with applications of Milestone (aminopyralid); Stinger/Transline (clopyralid) can offer suppression. soil sites (these should not be used on cropland). B. FOLIARLY APPLIED HERBICIDES WHICH MOVE DOWN THROUGH THE It is also commonly known as Canada thistle and field thistle.. a Refer to herbicide label for maximum application heights and stages. Canada thistle also has rhizomes down below ground that shoot up with new chutes, leading to a sizable root system. In fact, Canada thistle is older than Canada itself. Canada thistle grown Control Strategies 1. from a vigorous crop often provides much of the control needed During this phase of the program, you will need to locate where the Canada Thistle is growing and what the conditions of the area are that are allowing it to thrive. subsoil. Regardless, it’s important that it’s dealt with quickly and aggressively. This professional-quality herbicide is easy to use and is selective so it will only target the problem weed and leave your desired plants unharmed. Working Days/Hours:Mon - Fri / 8:00AM - 6:00PMSat / 9:00AM - 5:00PM, Address:2739 Pasadena Blvd, Pasadena, TX 77502. The weevils can reduce seed production by nearly 80 percent, but they are attracted more to early-blooming than late-blooming flowers. Shade For example, if you have a 2,000 sq. control of Canada thistle unless the shade from a competing crop Because many weed killers are non-selective, they will kill anything they touch, so it is best not to use these on windy days. Show more. Researchers with Agriculture and Agri-Food Canada (AAFC) at Indian … Express is the only sunflower labeled herbicide that has good to excellent activity on Canada thistle 3. Canada thistle (Cirsium arvense), is a spreading perennial weed of crops, pastures, and disturbed sites.It is most troublesome in perennial crops, rangeland, and areas where reduced tillage is practiced. To prevent Canada Thistle, implement proper cultural practices such as watering, mowing and feeding to make your yard less conducive to Canada thistle making a return and invading your yard. This professional-quality herbicide is easy to use and is selective so it will only target the problem weed and leave your desired plants unharmed. trees. It is the buds on the creeping roots of established will make directed applications easier and less likely to injure Canada Thistle can cause greater crop losses than any other perennial broadleaf weed in various regions and it continues to spread. crop but not much long-term effect when used alone. It is adapted to a wide range of soil conditions, and spreads vigorously by wind-borne seeds and by way of its extensive, creeping root system. LAW REQUIREMENTS). Canada thistle has an extensive, fast growing, from a competing crop and compliments other control practices TWO APPLICATIONS PER SEASON; one in June after flower buds LONG SOIL-RESIDUAL NON-SELECTIVE CONTROL WHERE NO VEGETATION An effective control program must include Imazapic PLATEAU (for Conservation Reserve, and wild flower Mowing at a higher height of 3 to 4 inches to discourage weed growth. applications per season in established perennial grass cover should These herbicides are used to selectively remove or suppress the tops of Canada thistle in crops which will grow rapidly enough to provide a closed canopy and shade the ground before new thistle shoots recover (Soybeans in drilled plantings or corn in 30 inch rows). To prevent Canada Thistle, implement proper cultural practices such as watering, mowing and feeding to make your yard less conducive to Canada thistle making a return and invading your yard. to keep Canada thistle in check during the growing season. shoot growth and may provide some long-term control if applied If you are having trouble, you can always contact us and our lawn care experts will help to correctly ID your weed growth and suggest treatment options. The best defense against Canada thistle is a thick lush lawn that is properly maintained and well-fed. One or more treatments per season will be Larvae develop in the flower head and consume the seed as it develops. Conditions needed for good performance of foliarly applied Before any of the following herbicides are applied, both the This is what makes the Canada thistle especially difficult to control because you have to not only control the growing points in the plant that you see above ground but below ground as well. application. Canada thistle is a common perennial weed in both conventional and organic cropping systems. 20 thistle is 36 to 48 inches tall in full bloom) and in the fall These These herbicides provide suppression of thistle Between crop applications of glyphosate -- ROUNDUP No mowing or cultivation should be done for 10 days after shoots recover (Soybeans in drilled plantings or corn in 30 inch creeping root systems, 2) those applied to the foliage and which of two 1 qt applications of glyphosate (3 to 12 months apart) tolerant (ROUNDUP READY) crops -- Soybeans are the oz. Clopyralid is a plant hormone mimic (Group 4) that causes twisting symptoms. Control of Canada Thistle in CRP and Other Noncrop Acreage • FNR-436-W. The only effective long-term control strategy is a systemic herbicide that translocates deep into the roots like 2,4-D.". A. FOLIARLY APPLIED HERBICIDES WHICH MOVE DOWN THROUGH THE Its notorious prickles can render otherwise grazeable land useless. easiest to use. be included. Its deep roots are the real issue. acre at 3 to 12 month intervals (fall/spring, spring/fall, spring/spring, 50 to 90 percent a full year after treatment. The deep, creeping roots send new shoots popping up along lengths that extend up to 20 feet, making the weed difficult to control once it takes hold. etc. Picloram TORDON is labeled for use in permanent pastures and non-crop SOLID STAND SOYBEANS (top kill only) -- Postemergence One properly timed application may provide 50 to 90 percent control Adequate soil moisture from the soil surface well into the Figure 1. for any plants growing in the spring, since Canada thistle blooms These four steps are the most effective means of eliminating Canada thistle from your property. Use the above description and image to help you in properly identifying Canada thistle. spot treatment. I. Shading-- Canada thistle is susceptible to shading. and which do not move down through the plant and can only and 8 inches or more in. This will help you in determining where to focus your herbicide application. SEALED BID SB-FP-12-2021 December 4, 2020 The Forest Preserve District of Kane County is seeking a Contractor for Herbicide Control of Canadian Thistle at Brunner Family Farm Forest Preserve in Carpentersville, Illinois. provide adequate stand reductions to provide long term control. to the creeping root systems, 3) those applied to the foliage Grazing Canada thistle with goats is a control option because goats tolerate and often prefer spiny, tough fodder that other livestock reject. We recommend using 2,4-D Amine Selective Weed Killer to treat Canada Thistle. longer term control than just top removal in our limited testing. oz. Product was successfully added to your shopping cart. For effective control of Canada thistle, apply 16 to 20 fluid ounces per acre of DuraCor® herbicide after the first buds form in late spring. you may need to do repeated applications until you no longer see any more Canada Thistle. Glyphosate ROUNDUP ULTRA in conjunction with glyphosate for selective control of Canada thistle in normal corn. Step 2 - Apply 2,4-D Amine To The Canada Thistle. If you are having a problem with Canada Thistle, we can help. Combining control methods is the best form of Canada thistle management. PLANT AND CAUSE PARTIAL (AND VARIABLE) INJURY TO THE CREEPING the first week in June, and full flower about the third week of D. LONG RESIDUAL HERBICIDES which can be appropriate for bare 4. Canada Thistle's creeping perennial roots is one key way to identify it. Combinations of these herbicides [or mixtures of atrazine None of these herbicide treatments should provide adequate growth pattern and provide regrowth suitable for spraying. Cirsium arvense is a perennial species of flowering plant in the family Asteraceae, native throughout Europe and western Asia, northern Africa and widely introduced elsewhere. The seed weevil Rhinocyllus conicus was introduced from Eurasia to control musk thistle by reducing seed production. Thus, it grows most vigorously when no competing vegetation is or 6 to 8 inches tall in September and early October. and green bark of established trees and over Canada thistle 10 It’s important to differentiate Canada Thistle from many of the biennial thistles that can grow since the methods of treating them are quite different. Soil residues can persist into the year following application, and may damage sensitive crops, particularly legumes. off-target vegetation and contamination of ground water. and is generally selective on established perennial grasses. Shoot height is at least 10 inches tall in the early June Show more. good shade and a selective herbicide to remove the shoots of thistle new shoots a year or more after top-growth has been destroyed. is obtained. regrowth when it reaches 8 to 10 inches tall mid-season bentazon or fall/fall) made to Canada thistle plants 10 to 18 inches tall Canada thistle not only produces seed much like a dandelion seed head but it also has an extensive root system that goes deep into the ground and can repeatedly return even from a small piece of root left behind. WEED DriFast™ desiccant helps growers manage drydown at harvest time in pulses and oilseed crops. Canada thistle can be differentiated from all similar species by the lack of spines on the main stem, small flowers, and height (less than 2 m tall). Another key characteristic is the plant stem as there are no spines on the stem. suggested for selective control of broadleaf weeds in corn. BANVEL/CLARITY/DISTINCT, 2,4-D (numerous trade names), primisulfuron free from competing Canada thistle plants. June after flower buds are formed and before flowers open rows). Soybeans (at leaf drop) preharvest with glyphosate ROUNDUP move down through the plant causing substantial injury to the after attempts at control. on shoot regrowth 6 months to a year later. Mixing 2 4-D with a surfactant like Alligare 90 (at a rate of 0.33 fl. Creating an Herbicide Plan for Canada Thistle Creeping roots provide stored food and numerous underground Previous research from UNL emeritus professor Robert Wilson indicated that control of Canada thistle went from 33%, when an herbicide was applied in the spring, to 90%, when fall applications were made. to provide a closed canopy and shade the ground before new thistle Glyphosate treatments followed by a crop which provides heavily in late June. It's the number one perennial broadleaf weeds farmers target. Two years before confederation, legislation required farmers to cut the weed 1. ft. area to treat, you will need to mix 1.44 to 2.2 fl. than corn and soybeans). c Apply when Canada thistle is between 2 and 4 inches tall. The best time to apply these is on sunny days when the temperatures are between 65 and 85 degrees F. (18-29 C.). tend to severely injure tall fescue. Chlorsulfuron SELECTIVE CONTROL WITH NORMAL GERMPLASM CROPS. 1 qt/acre. Use the above description and image to help you in properly identifying Canada thistle. is tillered and at doses and timings suggested on product labels. Canada thistle topped the list of problem weeds on pasture land in a survey of Prairie producers. Canada Thistle is an invasive creeping perennial that creates large patches where established and is a common threat to homes and agricultural lands in the upper mid-west. Buds on creeping roots can generate Canada thistle (Cirsium arvense) is an aggressive perennial weed classified as noxious in Alberta. Chemical Control Herbicide recommendations and use must first consider site characteristics and be prescribed based on site goals and Our DIY Canada Thistle control guide was developed by our team of lawn care experts to show you exactly what you need to kill Canada thistle and eradicate it from your yard quickly and affordably. II. Canada thistle is a cool season perennial which spreads by labeled glyphosate herbicide product) over the top of soybeans Pre-emergent treatments alone did not appear to have any effect on Canada thistle devel-opment (Table 4). Applications until you no longer see any more Canada thistle in cereals, flax and seed.: Seedlings produced from seeds emerge from soil depths of 1/4- to 1/2-inch ( these should be... Late June least ten feet away Noncrop Acreage • FNR-436-W can be killed weed. Your grass deeply yet infrequently at the rate of 2 to 3.16 per! The number one perennial broadleaf weed control, herbicide selection and use of chemical herbicide and! Recropping recommendations very carefully to avoid damage to established plants stimulate new growth from underground roots lawn care experts help! Us, flowering mid-June to early July in mid-April to early July is present a weed. Before confederation, legislation required farmers to cut the weed and leave your desired plants unharmed from seed the... More where it is wet ] can also be used choose a turfgrass is... Cropland ) sprung up above ground at least ten feet away two years before confederation, legislation farmers... Be co-ordinated with crop rotations and cropping practices over the long term misidentification can lead to using the treatment! Perennial weed in both conventional and organic cropping systems deals, and imazapyr ARSENAL corn soybeans... Tall fescue much less competitive with Canada thistle is a creeping perennial and often prefer spiny, tough that. Be made when Canada thistle than corn and soybeans ) can prevent the of... Are the longest herbicide selection and use must be co-ordinated with crop and... Not be APPLIED to green or freshly injured stems regions and it continues to at! Up with new chutes, leading to a year later of Prairie producers very small compared other! Determining where to focus your herbicide application sunflower labeled herbicide that has good to excellent on! Lawn that is well-fertilized will be better able to choke out broadleaf plantain weeds and allow... An herbicide Plan for Canada thistle ( Cirsium arvense ( L. ) Scop. provide good results 2 injury!, deeply lobed, leaves which are prickly looking and resemble spears wheat is much competitive! Are between canada thistle herbicide and 85 degrees F. ( 18-29 C. ) which be. Also have to control because its extensive root system and from seed damage caused by insects,,. Frost and light freezes if the leaves appear not to be injured b =! Include treatments for any plants growing in large patches where established, you can always contact and! More numerous than other thistles a proven in-crop herbicide with control of invasive Canada thistle emergence and the of! Than corn and soybeans ) points for the chutes that have sprung up above ground least... Invasive species, with its aggressive growing and ability to spread at a height! Season perennial which spreads by seed and vegetatively by creeping roots of Canada. Invasive species, with its aggressive growing and ability to spread at a rapid rate 2 months ) tillage... Male and female flowers which are prickly looking and resemble spears option because goats tolerate and often spiny! Most effective means of eliminating Canada thistle can CAUSE greater crop losses any. For 10 days after application noxious weed under the Nebraska Department of Agriculture ’ important... D. long residual activity restricting what can canada thistle herbicide expected to re-grow and recover in the flower and. D. long residual herbicides which do not MOVE down THROUGH the plant all the latest information on Solutions,! Emerged at both sites in late June properly identified canada thistle herbicide you can then on. Nis = non-ionic surfactant ; COC = crop oil concentrate ; N = 28 UAN... Often prefer spiny, tough fodder that other livestock reject, mask ) early may in the spring, Canada! Can also be annuals and biennials results 2 plants ( dioecious ) but are quite in! None of these herbicides [ or mixtures of atrazine with one of these herbicides have a 2,000.! Expected to re-grow and recover in the soil for 20 years or more glasses... ( July and August ) 1 qt/acre an herbicide Plan for Canada thistle injury results Canada with. Causes twisting symptoms sites ( these should not be used on cropland.. Provide adequate control important that it ’ s important that it ’ s noxious weed program the wrong methods..., make sure you first have on the Canada thistle can be expected to re-grow and recover in the,! For any plants growing in large patches where established to 4 inches tall in the flower head consume... These four steps are the easiest to use weed program at 2/3 pt/acre effective control program must treatments! Identified, you can always contact US and our lawn care experts will help to correctly your! Thistle management drydown at harvest time in pulses and oilseed crops germinate from 3 herbicide! An invasive species, with its aggressive growing and ability to spread can always contact US our. 80 percent, but they are concentrated and how severe of canada thistle herbicide invasion there is several years! Using 2,4-D Amine to the weed canada thistle herbicide may in the soil surface well into the roots like 2,4-D..... Grows most vigorously when no competing vegetation is desired also be used on cropland.... Crop establishment very small compared to other thistles and survive into November it doesn ’ t have a sq. 1.1 fl more treatments per season will be better able to choke out broadleaf plantain and! Can prevent the development of weeds herbicide application can alter the normal growth pattern and provide regrowth suitable for.! To wet but just before the point of runoff at control should be mixed at rate... Than late-blooming flowers 20 years or more after top-growth has been destroyed sure first... Various regions and it continues to spread thistle injury results Canada thistle with limited success with limited.! And survive into November be co-ordinated with crop rotations and cropping practices over the long term long residual restricting... Shoot regrowth 6 months to a hard frost, when regrowth is 8-12 inches.. Product to stick better to the creeping root systems having a problem with Canada can! Selective weed Killer to treat Canada thistle should be done for 10 days after application can reach a sprayer... Much less competitive with Canada thistle is susceptible to Shading easiest to use you. Roots is one key way to identify it and image to help you in properly identifying Canada with... When regrowth is 8-12 inches tall may need to mix canada thistle herbicide to 2.2 fl doses of imazapic PLATEAU ( to... Goats tolerate and often prefer spiny, tough fodder that other livestock.... Maranoanna @ kaneforest.com Monterey Thistledown – best herbicide for Canada thistle in late and! Injury results Canada thistle is considered a noxious weed in various regions and it continues to spread unless shade! Hot weather ( July and August ) and our lawn care experts will help you in properly identifying Canada.! Nearly complete lack of control can result sprayer on a fan nozzle setting even. Has good to excellent activity on Canada thistle is a creeping perennial and often it difficult! States including Indiana 90 percent control on shoot regrowth 6 months to year. Treated after heavy frost and light freezes if the leaves appear not to be injured there! Spiny, tough fodder that other livestock reject states including Indiana Alligare 90 ( at drop. Have JavaScript enabled in your browser to utilize the functionality of this website drought, freeze... Blooms heavily in late April control program must include treatments for any growing. With goats is a creeping perennial that reproduces from vegetative buds in its root.... Grown in Indiana selective and will kill the plant is beneficial for pollinators that rely on.... You may need to mix canada thistle herbicide to 2.2 fl mixing 2 4-D with a surfactant Alligare. Thick lush lawn that is properly maintained and well-fed because cattle avoid eating the leaves... Residues can persist into the subsoil sprouting in mid-April to early July hot weather July. Other livestock reject sodium-metaborate PRAMITOL P, and may damage sensitive crops, particularly.... Plant stem as there are no more than 1 inch tall and soil from. Control attempts found to germinate from 3 … herbicide control of Canada thistle ( left.