Results were positive for using an 8% concentration of vinegar as a control for Canada thistle (Cirsium arvense (L.) scop. 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. The weed killer works because the main ingredient, vinegar, dissolves the cell membrane of the plant tissue. Follow. Canada thistle is a creeping perennial that reproduces from vegetative buds in its root system and from seed. Canada thistle can be tricky to get rid of. QUESTION: What about using vinegar to control Canada thistle? ... You can spray only the plants you want gone with 20% vinegar. ... Vinegar: You can inject apple cider vinegar or plain white vinegar into the center of the thistle. Spray the thistles with the homemade weed killer. So your dandelions would be a challenge as are plants like morning-glory, horsetail, and Canada thistle. It is one of the plants that was easily killed with a 5% vinegar - the kind you buy a grocery store for making vinegarette. If you are looking for an all-natural way to get rid of Canada thistle, salt and vinegar is a great choice. Canada Thistle is a creeping perennial and often it … This weed killer is approved for organic use by OMRI, so... From $ 17.99. ANSWER: Although there are currently three different weed killers registered for use in Washington state with acetic acid (vinegar) as the active ingredient, none have proven to provide reliable control of established perennial weeds . Saskatchewan Agriculture, Food and Rural Revitalization, Agriculture Development Fund. I experimented with a common vinegar (5%)+epsom salts+dishwashing soap mix widely being shared on the web on a stand of Canada thistle in a pasture. Results were positive for using an 8% concentration of vinegar as a control for Canada thistle (Cirsium arvense (L.) scop. Share. Vinegar containing between 5% and 10% acetic acid was effective in killing young weeds. Canada thistle is misnamed, since it was brought to this continent from Europe in the early 1600's. Yes. Canada thistle shoots were highly susceptible with 100 percent kill by 5 % vinegar. Then, spritz the vinegar directly onto the thistle plants until the plants are dripping with vinegar. The plant is beneficial for pollinators that rely on nectar. In many areas, spot treatment of Canada thistle provides suicient control of thistle … Lemon juice raises the acidity of the weed killer and helps eat away the waxy coating on weed foliage, so the plant dies faster. It is difficult to control because its extensive root system allows it to recover from control attempts. Due to competition with crop plants, weed control legislation for Canada thistle was passed as early as 1795 in Vermont and 1831 in New York. However, therewas re-growth from Canada thistle roots. Canada thistle (Cirsium arvense) is a persistent perennial weed that causes significant crop yield losses.It reproduces through both seed and root regeneration, but the latter is the most successful. . This species differs from Canada thistle and field bindweed in being an annual. 0. To control Canada thistle, use Roundup® For Lawns 1 Ready-To-Use to spot treat plants as they appear. They eat the young thistles which are still tender in the early spring. The name Canada thistle is an American misnomer. According to the research on use of vinegar as a herbicide, Canadian Thistle can be killed by spraying it full strength with vinegar. Vinegar with a 9-percent or higher acetic level will kill weeds quicker. Thistles, such as Canadian thistles (Cirsium arvense), hardy in U.S. Department of Agriculture plant hardiness zones 2 through 8, are perennials that can become pesky weeds. Evaluating organic herbicides, summer annual cover crops and mowing for Canada thistle control. Organic Canada Thistle Control. Although traditional herbicides might be your best bet to get rid of thistles, you might prefer a home remedy, such as bleach or vinegar. If it rains, the vinegar will wash away, so you’ll likely need to do a second application. ). Perennial weeds (Canada thistle) treated with 5% vinegar showed 100% shoot burndown but roots were not affected, therefore shoots always re-grew. Commercial vinegar with 20% acetic acid was effective against crabgrass and broadleaf weeds. It grows at a rapid rate and can spread quickly. ), although these results were significant only in the second year of applications. To prevent future Canada thistle invasions, routinely fertilize your lawn (4 times per year) to keep it so thick and lush that there’s simply no room for weeds. Another control option for eradicating Canada thistle is to use herbicides that move down through the plant and cause substantial injury to the creeping root system. The thistle will then dry up and die. Spot spraying at the base of corn rows in the field indicated that corn plants were not affected byvinegar, and 90-100 percent control of weeds was obtained. Control of Canada Thistle in CRP and Other Noncrop Acreage • FNR-436-W Herbicides that are efective on Canada thistle will injure or kill most broadleaf plants (including legumes) and glyphosate will injure or kill grasses. 2006. It is also commonly known as Canada thistle and field thistle.. Vinegar is a natural weed repellent and one of the most efficient ways to get rid of thistle. Canada Thistle Control: How to Get Rid of Canada Thistle. Expect the vinegar to take a few days to a week to kill the thistles. Canada thistle. The lemon juice also has a high acid level, which aids the vinegar in breaking down the plant tissue. Control of annual weeds with vinegar at the 5 % acetic acid concentration (most products sold in grocery stores contain 5% acetic acid) was variable. Canada Thistle Control and Honeybees? Vinegar on Canada Thistle. Add to wishlist. Save. Canada thistle shoots were highly susceptible with 100 percent kill by 5 % vinegar. Which brings up a good point: if herbicide is used, it should only be used in combination with other IPM methods. From web sources there appears to be a recipe for making your herbicide from common household products. seemed to be effective under all treatments except for the subplots treated with vinegar (table 5). Canada Thistle Management Suggestions Original Question from Rowan Steele, EMSWCD Incubator Farm: I'm dealing with acres of heavy Canada Thistle outbreak and, short of spraying, don't have a great strategy for getting it under control or managing it long term. Other studies show that vinegar (acetic acid) can control weeds such as chickweed, ground ivy, pale smartweed, tumble pigweed, velvetleaf, and carpetweed. Add to compare. Sources call it a “magical, natural, weed killing potion” with high “safety, effectiveness, and naturalness” and recommend as “an alternative to chemical weed killers.” The recipe is a derivative of: ½ gallon of vinegar + ½ cup of salt + 2 tablespoons of dish soap. Mid JUNE. Fortunately, you do have some weapons at your disposal. The purpose of this project was to determine effective, sustainable ways to control perennial, noxious weeds with biologicals and vinegar on organic farms and ranches. How to Kill Thistle & Not Juniper. Canada thistle shoots were highly susceptible with 100 percent kill by 5 % vinegar, however, there was re-growth from roots. Add to Cart. The best time to treat Canada thistle with foliar herbicides is in late June after the first flowers are formed and before the first flowers open. Print. Canada Thistle and its Control . This is a rare win-win situation because the greatest thistle control coincided with the grazing system that gave the best production and best utilization of thistle.” For more information or to receive an electronic version of the booklet, How to Win the War on Canada Thistle, contact Bork at 403-492-3843 or [email protected]. Nelson Collinge of Kindersley, Sask., said the ideal time for Canada thistle control is from two days before the new moon to the day after. the weed in that abandoned field that had the pink flowers and is shedding the white fuzzies right now. 2. The vinegar sold at most stores has an acid level of 5 percent. It stores food energy in its extensive root system both to survive the winter and to fuel the plant's reproductive drive the following season. Spot spraying at the base of corn rows in the field indicated that corn plants were not affected by vinegar, and 90-100 percent control of weeds was obtained. By bumblebee255 ... Canada thistle is a class C noxious weed so do not knowingly proliferate it. The standard English name in its native area is creeping thistle. The mix burned down both the grass and the thistle … Find the base of the Canada thistle plant and simply snip it off at the base. Control of annual weeds with vinegar at the 5 % acetic acid concentration was variable. Canada thistle, a perennial, reproduces in the same way, but it has the added advantage of spreading by way of its roots; this makes control even more challenging. 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. If you want to banish thistle, you have to go to war against it. Masiunas, J. and A. Bicksler. Sure, elbow grease and the use of vinegar stress the plants out, so they are good tools to include in an integrated pest management (IPM) approach for Canada thistle. You've seen it . By Heintz [1 Post] Page Getting Rid of Canadian Thistle. Efficacy of vinegar (acetic acid) as an organic herbicide: Final report. Established perennial weeds usually will not be killed by vinegar. 30% vinegar, 30 percent vinegar, 300 grain vinegar, industrial vinegar, strong vinegar, vinegar for weeds, 20% vinegar, 20 percent vinegar, 200 grain vinegar ... musk thistle, oxalis, dandelions, and more! If you have it in your yard, you know of it as a truly awful plant that spreads aggressively by roots under the ground into large stands of spiny, dreadful weeds. We found that vinegar was a very effective organic control for bindweed, Canada thistle, … that while 5% vinegar solutions did not produce reliable weed control, solutions of 10, 15, and 20% provided 80-100% control of certain annual weeds (foxtail, lambsquarters, pigweed, and velvetleaf). . Cultural Control of the Canada Thistle (Cirsium arvense) Cattle, Sheep, and Goats: Each animal will eat the weeds instead of the grasses when the thistles are tender. Typically, this means 1 or 2 sprays per plant. Flag. Once killed it can only come back from seed. Do not pull Canada thistle out, as this can split the root, which causes two Canada thistles to grow back. Use full strength vinegar as a herbicide. Always a thorn in a gardener's side, thistle weeds pop up in the most undesirable places, commonly taking root among a lush, green juniper (Juniperus spp. Controlling Canada thistle organically is done with a sharp eye and an even sharper pair of scissors. Reply Was this helpful? Control of goosefoot (Chenopodium sp.) Combining control methods is the best form of Canada thistle management. By spraying it full strength with vinegar, use Roundup® for Lawns 1 Ready-To-Use to treat... To grow back stores has an acid level, which aids the vinegar in breaking down plant. 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