musk thistle identification

Carduus nutans is usually a biennial, requiring 2 years to complete a reproductive cycle. One plant can set up to 20,000 seeds. The key to successful musk thistle control is to prevent seed production. Fruit: Seeds borne in white or tan feathery structures, similar to dandelion, spread by wind. Nodding terminal compound pink-purple flowers May to August. Its large, nodding flower heads are distinctive and appear from June to August. Distaff thistle or Carthamus lanatus, an annual thistle, can reach a height of from 2 to 4 feet. Competes with native vegetation. It begins to disseminate seed from a head about two weeks after it first blooms. Bull thistle, also known as Cirsium vulgare, is a biennial thistle. Building a high enough population of insects to greatly reduce seed production takes five to 10 years. Lavender flowers appear in the months of June through July and are formed in clusters at the ends of the stems. Once established it spreads rapidly because of the large number of seeds produced. Musk thistle identification and control Carduus nutans This Class B noxious weed occurs in abundance in some parts of Washington State and is rare in others. A well-travelled migrant, the painted lady arrives here every summer from Europe and Africa. From Lym and Travnicek, 2015, NDSU Circ. The flowers, which appear in May through June, are quite large (2 to 3 inches in diameter), purple/lavender in color, and round in shape. and Their Identification Case Medlin Assistant Professor and Extension Weeds Specialist Ronald J. Tyrl Professor of Botany In 1994 a Thistle Law, was enacted in four counties in northeastern Oklahoma. A robust plant may produce 100 or more flowering heads.Musk thistle flowers over a seven- to nine-week period. The problem is….This prickly weed reduces the quality of grazing land. Lobed, serrate leaves; serration shallower than plumeless thistle. Forms dense colonies which reduces yield in forage crops. It has spread quickly throughout much of the Midwest, but is not yet common in Ohio. Identification: Musk thistle likely is the most easily identified invasive thistle in North Dakota, yet many people confuse this plant with either bull thistle or plumeless thistle. The seed weevil Rhinocyllus conicus was introduced from Eurasia to control musk thistle by reducing seed production. The Musk thistle is a common species of chalky soils and can be found on rough grassland, roadside verges, waste ground and scrub. Photo credit Gary Stone. The flower of musk thistle is 1-2 inches in diameter. Canada thistle will reach a height of 2 to 3 feet. It invades many types of habitats but is a serious threat to pastures as it is unpalatable to livestock. Creative Commons Attribution 4.0 International License. This thistle … There are five common thistles: bull thistle, musk thistle, Scotch thistle, distaff thistle and Canada thistle. The Musk thistle is a common species of chalky soils and can be found on rough grassland, roadside verges, waste ground and scrub. For full description, growth habits, and other control options: Identification and Control of Noxious and Troublesome Weeds in North Dakota, Copyright © 2017 North Dakota Department of Agriculture, North Dakota Crop Protection Product Harmonization and Registration Board, Risk Management Program for Anhydrous Ammonia Facilities, Worker Protection Standard and Worker Safety, Ag Products Utilization Commission (APUC), (FSMA) Produce Safety Rule Education and Outreach, Anhydrous Ammonia Risk Management Laws & Rules, Commercial Feed and Pet Food Registration and Licensing Guidelines, Contacting the North Dakota Department of Agriculture, Fertilizer Registration and Licensing Guidelines, Landowner Tips for Working with Pipeline Companies, North Dakota Department of Agriculture Events, North Dakota Department of Agriculture History, North Dakota Department of Agriculture Mission Statement, North Dakota Department of Agriculture News, North Dakota Department of Agriculture Publications, North Dakota Department of Agriculture Staff, North Dakota Farmers Market Locations and Times, North Dakota's Noxious Weed Laws & Regulations, Agriculture Fertilizer Distributors License, Application for Business to Sell Virulent Products, Application for Registration of Pet Foods and Specialty Pet Foods, Application for Representative of Satellite Video or Internet Livestock Auction Markets, Authorization by Satellite Video or Internet Livestock Auction Markets for Release of Financial Information, Authorization to Receive Restricted Use Pesticides, Interstate Swine Movement Assessment Approval, Notification of Intent to Download Anhydrous Ammonia, Organic Education and Transition Cost Share Program, Pipeline Restoration and Reclamation Program Evaluation, Pipeline Restoration and Reclamation Program Request, Running Inventory of Restricted Use Pesticide Sales, Specialty Crop Block Grant Reimbursement Request, Weed Seed Free Forage Certification Request to Inspect, Animal Movement and Importation Requirements, Pipeline Restoration and Reclamation Oversight Program, Wind Energy Restoration and Reclamation Oversight Program, Anhydrous Ammonia Nurse Tank Inspection Checklist, Anhydrous Ammonia Storage Facility Inspection Checklist, Federal Environmental Law Impact Review Committee (FERLIC), North Dakota Department of Agriculture Official Forms, North Dakota State Board of Animal Health, Pipeline Restoration and Reclamation Program Request Form, Trichomoniasis-Statements To Be Included on Certificate of Veterinary Inspection, Novel Swine Enteric Coronavirus Disease (SECD), CHRONIC WASTING DISEASE SURVEILLANCE VARIANCE, Checklist for Obtaining an Anhydrous Ammonia License, Risk Management Program (RMP) For Agricultural Anhydrous Ammonia Facilities, FIFRA Section 25(b) Registration Exemptions, North Dakota Department of Agriculture Seed Policy, Special Pesticide Registrations: Section 18 and 24(c), Business, Marketing & Information Division, Ag in the Classroom Professional Development, Federal Environmental Law Impact Review Committee (FELIRC), North Dakota Organic Education and Transition Cost Share Program, Pride of Dakota Trade Show Assistance Program, CARES Act North Dakota Bioscience Grant Program, Certification of gravel, scoria, topsoil or sand surface mining operations, Charitable Food Organization Grants Distribution, Covid-19 - Coronavirus (Animal Health Div), ND Ag in the Classroom School Lunch Recipes, Wind Energy Restoration and Reclamation Oversight Program Evaluation. Insects are commonly found on bull thistle, so insects that feed on some of the native Cirsium species may be keeping its populations in check. Seen it? Musk thistle invades pastures, meadows, and fields, displacing native and/or beneficial forage species. Musk thistle stems are usually very branched with spiny wings; however, the wings are interrupted and not complete along the stem as with bull or plumeless thistle. You will also find 1/8- to 3/8-inch spines on the tips of the leaves. Bull thistle is distributed statewide. Musk thistle (Carduus nutans) invaded Oklahoma primarily from Kansas and Missouri around 1960. Also called nodding thistle. Musk thistle (Carduus nutans) is a 3- to 8-foot biennial thistle.

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