Their puffy appearance distinguishes this thistle from other thistles that have a shaving brush look. • Upper flower stems are typically bare. But the rosette weevils attack the plant, which could weaken it such that it can produce fewer flower heads. As a Class B noxious weed, its control is required in King County. Kok. Thank you! A Northern Arizona Homeowner's Guide to Identifying … Managing Musk Thistle – https://www.unce.unr.edu/publications/files/nr/2002/FS0255.pdf, Musk Thistle Control – https://www.asi.k-state.edu/doc/forage/fora39.pdf, About Musk thistle identification and control – https://www.bookstore.ksre.ksu.edu/pubs/L231.pdf, Musk thistle – https://www.uaex.edu/publications/PDF/FSA-3054.pdf, Musk thistle – https://extension.colostate.edu/topic-areas/natural-resources/musk-thistle-3-102/. Herbicides containing picloram, clopyralid, 2,4-D, triclopyr, and dicamba are commonly used. Cutting the root below the ground level will be effective. Ecosystem connections: Musk thistle spreads its dense basal rosette and crowds out native plant and grassland species through competition for resources. A third biological control agent for musk thistle is a rust fungus. They arrange themselves alternately on the stem and feel smooth to the touch on both sides. While searching for Palmer amaranth in a pollinator habitat planting I encountered a few musk thistles. PLANT NEWS. At the tip, you will find a protrusion while the base is round. I am passionate about invasive plants and love sharing everything I learn about them. A good way to deal with this is to mow after the stems have started to grow, but before the flowers open. Kansas Noxious Weeds There are 12 plant species designated as noxious weeds in Kansas. The weevils can reduce seed production by nearly 80 percent, but they are attracted more to early-blooming than late-blooming flowers. An excellent example of this reduced capacity would be Colorado, where this weed has infested over forty thousand acres. In this article we will talk about how to control musk thistle. Here, they remain dormant as they await the next spring. Not only does this reduce the number of plants in an area, but it also ensures that the plants do not spread to neighboring regions. Also, it can kill the plant and put an end to seed production from the given plant. The eggs thus lie on the flowers covered with chewed plant material, which gives them a scale-like appearance. Musk thistle was introduced to North America as a garden flower by European colonists. Musk thistle (Carduus nutans), or sometimes referred to as nodding thistle, is a weed that is increasing in pastures throughout the western and southern counties of Indiana.Its rapid invasion of pastures can quickly decrease the size of grazing areas for livestock. Thistle Control in Grassland Creeping Thistle Cirsium arvense & Spear Thistle Cirsium vulgare control in grassland Whilst all plants have a value to wildlife, some can become very invasive in grassland, such as thistle, ragwort, dock nettle and even rush on wetter sites. Near the surface, the root will appear hollow. Musk Thistle Invasive Plants, US Forest Service. �?�P8$ �BaP�d6�DbQ8�V-�FcQ��v=�HdR9$�M'�JeR�d�]/�LfS9��m7�NgS���}?�PhT:%�G�RiT�e6�O�TjU:�V�W�VkU��v�_�XlV;%��g�ZmV�e��o�\nW;���w�^oW�����`pX ��bqX�f7��drY'���ry\�g7���tz]>�W���v{]��w���x|^? Musk Thistle Control. Establishing a dense, well-maintained pasture is effective in preventing a musk thistle infestation. The key to controlling Musk Thistle is not to let it seed. By using TerraVue ™ herbicide at an application rate of 2.85 ounces per acre, vegetation managers can effectively treat areas in which musk thistle and other broadleaf weeds or brush species have developed. 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