Each flower head measures approximately 2 inches. Apply Shredder 2,4-D LV6 Herbicide to kill annual, biennial and perennial weeds such as bull thistle, cornflower, wild lettuce and goldenrod. Product Drawbacks: May require the use of a surfactant for the product to stick better to weeds. Each seed can remain viable for a decade. Early spring is typically the emergence and prebud stage. 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. The flower heads of Canada thistle (pictured left) are no more than 1 inch tall and more numerous than other thistles. We've been using Outlaw this year, weeds are getting big now but it seems to knock their ass over. I tend to take care of it. However, there are a few things to consider to ensure you're picking the right herbicide for the job. Going from memory here, too lazy to walk down to the chemical storage. 700LH: That is the same dilution I use on the lawn. Need some advice of which one to use 2-4D doesn't seem to work.Don't want to kill everything like Round Up does. What I have is a cuople of dry creek bottoms in a two community parks. Combining control methods is the best form of Canada thistle management. Canada Thistle's creeping perennial roots is one key way to identify it. OK, report - - all Canada thistle has a very bad belly ache. Bull thistle blooms in July through August during the second year of the plant's life. The stems of Canada thistle lack the conspicuous spiny wings found on bull thistle (C. vulgare) Legal status in King County, Washington. If you're running pasture, put the salt block in anything you want to kill. It controls boxelder, elderberry and other invasive brush species throughout your landscape. It, too, grows tall—up to about 6 feet. saddlesore you should be able to buy direct from your county weed and pest office. nual), Spanishneedles, Sunflower, Sweetclover, Tansymustard, Tansyragwort, Thistle Bull, Thistle Musk, Thistle Russian, Velvetleaf, Vervains, Vetch, Water Plantain, Witchweed, W ormwood, Yellow Rocket, Yellow Starthistle. Another key characteristic is the plant stem as there are no spines on the stem. A couple of the chemicals suggested are restricted use (pesticide applicator license required) for Tordon or Grazon. Same goes for leafy spurge also. Two common thistles are bull and Canada thistles. Persistence is imperative so the weed is continually stressed, forcing it to exhaust root nutrient stores and eventually die.Canada thistle (Cir… The first documented report of musk thistle in Kansas was from a collection made in Washington County inI 1932. On smaller plants, the whole stem and branches are spiny-winged. Thistles are invasive weeds that grow deep roots, which makes them difficult to control. Animals don’t like to put their nose into that sward.” Thistrol herbicide may work, but not sure if it is labeled for your application. It was first recorded in the United States in 1852 at Harrisburg, PA. Leaves of young plants are fleshy, dark green, narrow, and about 1 inch in length. You can mix it with your 2,4,D. There are no ag suppliers within 30 miles of here. It is difficult to control because its extensive root system allows it to recover from control attempts. In the winter, thistle is usually dormant. My understanding of how Roundup works is that putting a drop down a cut stem is NOT effective, or at least not ideal. Next day they would be black, like they had been dead for a week. Spot spray those puppies with Milestone. Observe where your thistle is growing. Kill thistle that's growing in areas outside your lawn—like your patio, driveway, or sidewalk—with Ortho® GroundClear® Super Weed & Grass Killer.. Apply herbicides such as Tordon, Milestone, Transline, Perspective, Vanquish/Clarity or 2,4-D to musk thistle rosettes in spring or fall. Pffft. "Dicamba Plus 2,4-D Herbicide is a combination of two great active ingredients, meaning that it will kill a broad range of weeds so you don't have to use or mix a bunch of different products if a weed is being particularly stubborn." 2,4-D LV4 Herbicide is a specially formulated postemergence herbicide that provides effective control and suppression of brush, annual, biennial, and perennial weeds on CRP, grain sorghum, pastures, rangeland, fallow systems, and other crops. Thanks for all the advice guys. Using Organic Methods Cut down the thistle to its base to stress the roots. If left unchecked, a single Canada thistle plant eventually turns into a patch containing thousands of stems. dun wrote:I've alwasy used 2,4-d Amine that says it's 47.2% the chemical.The new stuff I got is ester and is 64.2% or right at that. Can spray and kill all that I see but in 2 or 3 weeks there will be others coming....spray again. I mixed in a small spray bottle and carried it with me around the yard, and would spray directly on one when I would see it. We have all different kinds of thistle in our fields. Find out what herbicides are illegal to use in your state. 2,4-dichlorophenoxyacetic acid is indicated to kill broadleaf weeds, but not most grass weeds.. Going from memory here, too lazy to walk down to the chemical storage. In fields we can use roundup after crops are off and this works very well. Use glyphosate for your garden, and use a broad-leaf herbicide containing 2,4-D or MCPP for your lawn. Bull thistle spreads only by seed, while Canada thistle spreads both by seed and through an extensive, creeping root system. Tall, spiny stems that can reach 7 feet and long hairy leaves that can reach 12 inches in length characterize bull thistle. Fall (before a frost) is good but also spring pre-flower. Musk thistle is a noxious weed in all counties in Kansas. Transline works on a variety of thistles. In our pasture, I shred an area, let it warm up and just before the blooms start to turn to seed I shred it each year. Because of this, using an herbicide that penetrates the foliage of the thistle and works its way down to the roots to kill it is one of the best methods to eradicate thistles once and for all. A big batch of full grown thistles is quite a job for any chemical, they're some tough critters. Glyphosate: Herbicides containing glyphosate can effectively control bull thistle. Thistles are invasive weeds that grow deep roots, which makes them difficult to control. Only takes 4 CC to a gallon. Find out what herbicides are illegal to use in your state. Folks I talked to at the local ag chemical supply said that if you knock em down with Curtail now and hit em again right before freeze-up that should do em in but that there will always be some spot follow-up. The two common thistles in Whatcom County are Canada thistle and bull thistle. Bull thistle control can be manual or chemical with an emphasis on seed co… Thistles (at least Canada, musk and bull) seems to be a fairly weak plant IME. Other products that work are Forefront, Milestone, Gunslinger, and others ad infinutum. While scouting, you may encounter tall thistle, Le Conte’s thistle, swamp thistle, Nuttall’s thistle, purple or yellow thistle, bull thistle, Virginia thistle, and possibly others. When maturin… 4. The plant has colonized much of North America and is a pest plant in the garden and in agriculture. Bull thistle (Cirsium vulgare) is a plant that is related to the sunflower family but has none of the charm and beauty of those sunny-nodding flower heads. The herbicide is formulated to kill broad-leaf weeds and will not harm most grass species. I can't speak to the thistles, since I have never had any. Crossbow and Roundup did a number on sand burs though. I had a bad thistle problem a couple years ago. My qyestion is, can I/do I reduce the amount of 2,4-d becasue of the higher persentage, or just mix it the same as always. It does the trick but may be hard to get your hands on without an applicators license. The key to successful musk thistle control is to prevent seed production. READ THE DIRECTIONS so you don't get hurt. Apply Escort or Telar up to the early flower growth stage. 2,4-D will kill them, you just have to have a stronger mixture and you might have to do repeat sprayings. Canada and bull thistle are some of the varieties of thistle you may find in your lawn. Even after you pull or dig them out repeatedly, they can continue to grow back. This is not a guess but info from the chemical companies and university studies. Nearly any herbicide will kill them. It was off label; maybe there's one that's made for it now. 2-4D will kill thistle temporarily, but since they have a hardy root, they will keep coming back. They seem to come up for 2 years from a ripe seed head. Seedlings have very finely dissected leaves that almost look like pine needles. Young plants are suitable for livestock forage and are sometimes grazed. Bull thistle is a Class C Noxious Weed in Washington, first listed in 1988. She has also written for various online publications. Let me check the garage and see if I can't find the stuff. Animals don’t like to put their nose into that sward.” Combining control methods is the best form of Canada thistle management. For example, an herbicide with the ingredient chlorsulfuron (sold as Telar) is a suitable herbicide to use to eradicate Canada thistle that is growing in your lawn in the early spring when the shoots begin to rapidly emerge until it begins to grow buds. Re: What herbicide for killing thistles? Determine at what stage of growth your thistle is. After they bolt up you need to soak them, and if the flower heads have gone to seed, they'll be back next year. Canada thistle also has lobes that can be irregular from leaf to leaf. ED. You gotta get thistles before they make a head. dun wrote:I've alwasy used 2,4-d Amine that says it's 47.2% the chemical.The new stuff I got is ester and is 64.2% or right at that. You can also use various brands of sticker. or sow thistles in your yard? Ranch.It is not public county owned land. Weeds can greatly impact the overall carrying capacity of a hayfield. Saddlesore, did you try the ag chem dealers who supply farmers? Plan the perfect garden with our interactive tool →, Virginia Tech Weed Identification Guide: Canada Thistle, U.S. Army Corps of Engineers: Examples of Illegal Herbicides. The only thing I found in the area was 2-4D ,nothing else available. 1. Canada thistle has leaves that are hairless near the top but that may be or not be hairless on the lower end of the leaves. 3. Spring and fall are typically when thistle is actively growing. However, since you cannot legally use chlorsulfuron in some states, including California and Montana, select another herbicide instead, such as one that contains aminopyralid. I try to go back weekly if I can to catch any stragglers that come on later. Public and private landowners are not required to control infestations of bull thistle that occur on their property in King County. Alrighty then, now we're getting somewhere. Canada Thistle flowers are also unique because they have both male and female flowers which are very small compared to other thistles. The roots of Canada thistle spread aggressively, and can increase the width of a thistle patch 6 to 10 feet in a season. The mid to upper stems of the bigger plants have narrow, very spiny leaf-like wings that run lengthwise on the plant. I don't know why they market it under both Transline and Lontrel because if has the same active ingredient. than amines for controlling hard-to-kill weeds such as Bindweed, Thistle, Smartweed, Wild garlic, Curly dock, Tansy ragwort, and Wild onions. Also, our thistles have different growning seasons...I guess they're different kinds. Glyphosate will also kill grasses that compete with bull thistle, so treatment with glyphosate should be combined with effective re‐vegetation of the site to prevent seedlings from re‐ infesting the area. I replace valve cover gaskets every 50K, if they don't need them sooner... Oldtrapper. For more information, see Noxious Weed Lists and Laws or visit the website of the Washington State Noxious Weed Contr… It is important to accurately identify the species of thistle you are trying to control, as control methods differ between the two species. for farmers is 48%. Maybe 20 acreas in all.I mixed the 2-4d double strength and it didn't do much There seems to be three differnt types.The big tall dark green ones,pink flowers,I think are Canada, some smaller ones that have more of a greyish tint w/ white flowers to them and a bunch of smaller ones in real thick concentration. Since glyphosate kills all plants, you must keep application specific. IIRC 2-4-D for home use is about 7%,(Ortho from Home Depto etc.) This information is also posted on the herbicide’s label. This is a starting point only, your case Milestone ® herbicide goes easy on desirable species, including most forage grasses and many deciduous trees, forbs and other plants. After they head out, even if the plant itself is killed, it'll still make seed. Stems vary from 8 to 36 inches in length and usually have reddish to purplish stripes. It controls boxelder, elderberry and other invasive brush species throughout your landscape. A mix suggested by Dow is Curtail, (NOT a restricted use herbicide) which is a mix of clopyralid and 2-4D. ;-{>. Fire has not been effective as a method for directly controlling musk thistle. Lewis holds a Bachelor of Arts in psychology from the University of Maryland Baltimore County. 3. The best time is to get them early, just a whif will kill them when they are in the rosette stage. It, too, grows tall—up to about 6 feet. 4. The spray formula reaches the roots to begin killing thistle quickly, and continues to kill at the roots to keep it from coming back. A little dish soap added to the chemical helps a lot. Control of Canada Thistle in CRP and Other Noncrop Acreage • FNR-436-W. Apply herbicides to kill thistle, especially in spring and fall, before thistles can flower and seed. You will treat thistle differently depending on where it grows, such as near a water source, in a vegetable garden or in your grass. There is Big R store,but they only had 2-4D or Roundup. That usually takes care of it. Canada thistle has leaves that are hairless near the top but that may be or not be hairless on the lower end of the leaves. Figure 1. You can take a sample to your local county extension office or to your local nursery, if necessary. The per gallon herbicide rates were calculated under the assumption that most people, when spot spraying by hand, will apply somewhere around 100 gallons/acre of the spray mixture. Been fightin them accursed Canada thistle myself lately. Yes, it is more expensive initially, but when you consider how little you have to use, it's a bargain. Canada thistle won't tolerate repeated cutting either. baking soda, sprinkled on and around the stem, will kill 'em. Although there are at least nine different species of thistle in Florida, most are closely related and control recommendations will not differ. The best time to treat biennial thistles with herbicides is in late fall or early spring when the rosettes are present but before flowering stalks are initiated.Musk thistle and bull thistle plants with seed stalks are more difficult to kill than the rosettes. “For a beef operation, the reduction can be between 42 and 72 percent. I expect to use two applications so I'm happy when the first one does it. Milestone works great! I haven't seen one in my yard for a while. Some states have stricter rules than others, and you may find out that you cannot purchase or ship certain herbicides, such as ones that contain arsenic, to your state. Read the herbicide’s label carefully and select one based on the preceding information. Yes, 2-4-D will take out broadleaves and not harm grasses. For example, an herbicide with the ingredient chlorsulfuron (sold as Telar) is a suitable herbicide to use to eradicate Canada thistle that is growing in your lawn in the early spring when the shoots begin to rapidly emerge until it begins to grow buds. “Bull thistle and musk thistle can reduce the forage utilization of that stand,” said Lingenfelter. Canada thistle is a creeping perennial that reproduces from vegetative buds in its root system and from seed. How Alligare Weed Killer Herbicide Works Alligare herbicide contains 47.2 percent dimethylamine salt of 2,4-dichlorophenoxyacetic acid. Here in Pa. cutting alfalfa at least 4 times a year will kill the thistle growing in the alfalfa. Myron, you need to take a serious look at where Saddlesore is doing this little project.... And remember it's a FEDERAL offense to use chemicals out of label, and on someone elses property without a proper applicators license and property owners permission... Saddlesore your best bet is to get ahold of the county weed and pest office and lean on them to get those thistles, especially as they are growing on "public" property. It also helps restore diversity in areas overrun by many noxious and invasive weeds without posing a long-term threat to … Also, select one that is safe and legal to use where your thistle is growing. 2,4-D LV4 Herbicide is a specially formulated postemergence herbicide that provides effective control and suppression of brush, annual, biennial, and perennial weeds on CRP, grain sorghum, pastures, rangeland, fallow systems, and other crops. soap). We used to mix crop oil with the 24D to get it to work better on thistles. 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