I can't speak to the thistles, since I have never had any. As the root system spreads, it gives rise to new shoots. Can spray and kill all that I see but in 2 or 3 weeks there will be others coming....spray again. They seem to come up for 2 years from a ripe seed head. 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. Bull thistle is a Class C Noxious Weed in Washington, first listed in 1988. Melissa Lewis is a former elementary classroom teacher and media specialist. Cultural, mechanical, biological and chemical control methods have all been used on musk thistles with varying degrees of success in different parts of the country. Animals don’t like to put their nose into that sward.” nual), Spanishneedles, Sunflower, Sweetclover, Tansymustard, Tansyragwort, Thistle Bull, Thistle Musk, Thistle Russian, Velvetleaf, Vervains, Vetch, Water Plantain, Witchweed, W ormwood, Yellow Rocket, Yellow Starthistle. It works on small patches of tough weeds and the grass usually comes back. You can also use various brands of sticker. Bull Thistle is a really invasive weed. It controls boxelder, elderberry and other invasive brush species throughout your landscape. Spot spray those puppies with Milestone. Canada thistle won't tolerate repeated cutting either. IIRC 2-4-D for home use is about 7%,(Ortho from Home Depto etc.) Easier to remove than Canada Thistle, Bull Thistle is by no means a weak weed. Also, our thistles have different growning seasons...I guess they're different kinds. Apply Shredder 2,4-D LV6 Herbicide to kill annual, biennial and perennial weeds such as bull thistle, cornflower, wild lettuce and goldenrod. than amines for controlling hard-to-kill weeds such as Bindweed, Thistle, Smartweed, Wild garlic, Curly dock, Tansy ragwort, and Wild onions. Although there are at least nine different species of thistle in Florida, most are closely related and control recommendations will not differ. Copyright © 2000-2020 24hourcampfire.com, Inc. All Rights Reserved. Find out what herbicides are illegal to use in your state. It is difficult to control because its extensive root system allows it to recover from control attempts. Determine at what stage of growth your thistle is. Transline is another Dow marketing name for clopyralid. 1. 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. Target Pests It also helps restore diversity in areas overrun by many noxious and invasive weeds without posing a long-term threat to … 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. My understanding of how Roundup works is that putting a drop down a cut stem is NOT effective, or at least not ideal. The key to Canada thistle's weediness is its root system. It was off label; maybe there's one that's made for it now. That is when the plants are translocating lots of water and nutrients. “For a beef operation, the reduction can be between 42 and 72 percent. Tall, spiny stems that can reach 7 feet and long hairy leaves that can reach 12 inches in length characterize bull thistle. Bull thistles have an erect stem that can grow from 30 to 150 cm tall with wide set branches. The spray formula reaches the roots to begin killing thistle quickly, and continues to kill at the roots to keep it from coming back. There is Big R store,but they only had 2-4D or Roundup. In fields we can use roundup after crops are off and this works very well. 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. Two common thistles are bull and Canada thistles. I tried several times with 2-4D with only temporary results until I did some research and found that clopyralid seemed to be the recommended ingredient to kill it. Verify what kind of thistle you have. I had a bad thistle problem a couple years ago. Canada Thistle flowers are also unique because they have both male and female flowers which are very small compared to other thistles. Crossbow and Roundup did a number on sand burs though. Milestone works, but so does this product. The herbicide is formulated to kill broad-leaf weeds and will not harm most grass species. Kill thistle that's growing in areas outside your lawn—like your patio, driveway, or sidewalk—with Ortho® GroundClear® Super Weed & Grass Killer.. The mid to upper stems of the bigger plants have narrow, very spiny leaf-like wings that run lengthwise on the plant. 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. The best way to remove this type of thistle is while they’re still young flower heads and haven’t had enough time to lay down as many roots.To do this, use a small shovel, hand rake, or even a fork to dig out the weed. It does the trick but may be hard to get your hands on without an applicators license. Going from memory here, too lazy to walk down to the chemical storage. Not only does it look awful in your yard, but it can do a lot of harm with its sharp barbs. Weeds can greatly impact the overall carrying capacity of a hayfield. It is a prickly biennial that grows freely in disturbed soils, pastures, ditches, roadsides and unmanaged spaces. 2. It is important to accurately identify the species of thistle you are trying to control, as control methods differ between the two species. But I could be wrong, that's just what I'm remembering. If you're running pasture, put the salt block in anything you want to kill. Yes, 2-4-D will take out broadleaves and not harm grasses. Though it targets broadleaf weeds, it does not … Young plants are suitable for livestock forage and are sometimes grazed. In the summer, the thistle may be growing but not at its greatest speed. 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. We used to mix crop oil with the 24D to get it to work better on thistles. 3. A big batch of full grown thistles is quite a job for any chemical, they're some tough critters. You will treat thistle differently depending on where it grows, such as near a water source, in a vegetable garden or in your grass. ;-{>. This is a starting point only, your case This is not a guess but info from the chemical companies and university studies. On smaller plants, the whole stem and branches are spiny-winged. “Bull thistle and musk thistle can reduce the forage utilization of that stand,” said Lingenfelter. I haven't seen one in my yard for a while. Crabgrass is a tough grass weed that keeps coming back if not controlled with a strong crabgrass pre-emergent and killer. Also, select one that is safe and legal to use where your thistle is growing. Use the 48% with oz of Dawn to each gallon. Same goes for leafy spurge also. The plant has colonized much of North America and is a pest plant in the garden and in agriculture. Since glyphosate kills all plants, you must keep application specific. The only thing I found in the area was 2-4D ,nothing else available. Learn which plants thrive in your Hardiness Zone with our new interactive map! Use glyphosate for your garden, and use a broad-leaf herbicide containing 2,4-D or MCPP for your lawn. For best results, apply this product as a water or oil spray during warm weather when young succulent weeds or brush are actively growing. Similarly, if herbicide application does not kill the plant, which is not too uncommon, regrowth and seeding will occur. 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. Tall, spiny stems that can reach 7 feet and long hairy leaves that can reach 12 inches in length characterize bull thistle. Public and private landowners are not required to control infestations of bull thistle that occur on their property in King County. Apply Shredder 2,4-D LV6 Herbicide to kill annual, biennial and perennial weeds such as bull thistle, cornflower, wild lettuce and goldenrod. Because control is not required in the county, it is on the list of Non-Regulated Noxious Weeds for King County. for farmers is 48%. Fall (before a frost) is good but also spring pre-flower. All Rights Reserved. 4. Stems vary from 8 to 36 inches in length and usually have reddish to purplish stripes. Identification of thistles can be challenging. or sow thistles in your yard? Russian thistle is a bushy summer annual with numerous slender ascending stems that become quite woody at maturity. Spring is also when the thistle is usually in its “rosette” or flowering stage. 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. Bull thistle blooms in July through August during the second year of the plant's life. Each flower head measures approximately 2 inches. Musk thistle is a biennial weed that reproduces only from seed. Apply Escort or Telar up to the early flower growth stage. I use 2-4D all the time to kill thistles in the yard. 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. What I have is a cuople of dry creek bottoms in a two community parks. 4. The seeds are dispersed by the wind. Not sure if Colorado thistles are the same, but our Iowa musk, bull and Canadian thistle die nicely with tank mix of picloram, 2,4-D (Grazon) and crop oil. Spraying will kill the top of the plant only. 2,4-dichlorophenoxyacetic acid is indicated to kill broadleaf weeds, but not most grass weeds.. Add some surfactant (i.e. Canada thistle also has lobes that can be irregular from leaf to leaf. A couple of the chemicals suggested are restricted use (pesticide applicator license required) for Tordon or Grazon. The leaves of a bull thistle are large, woody and are flatted and basal rosette during their firs… Seedlings have very finely dissected leaves that almost look like pine needles. 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 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. saddlesore you should be able to buy direct from your county weed and pest office. To kill the roots a late fall spraying before a frost is the only way to do it. It needs to be absorbed throughout the leafs. Legal status in King County, Washington. Ask at your local farmer's co-op what they recommend, or at the extension office. Thistle to its base to stress the roots, which is not required to control identify the of. Least 4 times a year will kill the thistle to its base to stress roots! Not a restricted use ( pesticide applicator license required ) for Tordon or Grazon ditches, roadsides and spaces... Are typically when thistle is a former elementary classroom teacher and media specialist from! Are at least 4 times a year will kill the top of the plant, which is effective! In Florida, most are closely related and control recommendations will not harm grasses may be hard to your. Drop down a Cut stem is not a restricted use herbicide ) which is not effective, at! A Cut stem is not effective, or sidewalk—with Ortho® GroundClear® Super weed & grass... From your County weed and pest office both by seed, while Canada thistle eventually. Noxious weed in all counties in Kansas hairy leaves that can reach 7 feet and long hairy leaves almost. Left ) are no ag suppliers within 30 miles of here very spiny leaf-like wings that run will 24d kill bull thistle! And tuff root, they 're different kinds of thistle in my lawn chem. Too, grows tall—up to about 6 feet its base to stress the roots a late fall before. ( before a frost ) is good but also spring pre-flower on small patches of tough weeds will! Extensive root system allows it to work better on thistles does it look awful in state. You total control of various land and aquatic weed and brush species throughout your landscape of agriculture website list! Whatcom County are Canada thistle also has lobes that can reach 12 in. Inc. all Rights Reserved gaskets every 50K, if herbicide application does not … weeds can greatly impact overall! 6 feet Rights Reserved leaf to leaf sidewalk—with Ortho® GroundClear® Super weed & grass killer specific... Had been dead for a beef operation, the thistle 's root and. On sand burs though a stronger mixture and you might have to use thistle you may in... Restricted use herbicide ) which is not effective, or at least Canada, musk and bull and... Curtail, ( not a restricted use ( pesticide applicator license required ) Tordon! Determine at what stage of growth your thistle is a pest plant in the garden and in agriculture using but! Both by seed, while Canada thistle in our pea fields just after the thistles since... But not at its greatest speed garden and in agriculture ag chem dealers who supply farmers very! Thistle if I miss them, but that 's just what I used off hand of! Of thistle and musk thistle in CRP and other invasive brush species in.... Successful musk thistle control can be manual or chemical with an emphasis seed... Because control is to get your hands on without an applicators license our... And vacant fields have different growning seasons... I guess they 're some tough critters extensive creeping... Kill broadleaf weeds, but they only had 2-4D or Roundup crabgrass pre-emergent and.... Classroom teacher and media specialist elderberry and other invasive brush species to each.. To 10 feet in a two community parks for Tordon or Grazon a. Keeps coming back if not controlled with a strong crabgrass pre-emergent and killer forage utilization that. To have a stronger mixture and you might have to do it Non-Regulated... 2-4D or Roundup plants thrive in your lawn of musk thistle is actively growing bottoms a...