Score0 - High: Occurs in >25 Subwatersheds (6th Code HUC’s). Score0-1 - Low to Moderate Vulnerability. The inflorescence usually consists of a terminal cluster of 2 to several flower heads and a number of side branches which reach up to 15 cm long and have fewer heads; each flower head is ca. Score1 - Moderate: Generally 10,000-100,000 individuals. The first thing to do is to ensure that the species is truly musk thistle. There are numerous tawny bristles which form a pappus at the tip of the achene. At least on my property, I attempted to cut the heads off prior to flowering and was probably 85% effective. Score Long-styled Thistle - Cirsium longistylum, native, Montana endemic, and SOC * Upper leaf surface lacks spines. A review by DeLoach indicates 90 to 99% reduction of in musk thistle stands in Montana and Virginia and 80 to 90% reduction in Missouri. Mia McPherson 2019-11-07T05:36:14-07:00. I cut these down when the thistle head had formed but had yet to open. (Click on the following maps and charts to see full sized version), (Observations spanning multiple months or years are excluded from time charts), http://FieldGuide.mt.gov/speciesDetail.aspx?elcode=PDAST2E1P0, Rocky Mountain Subalpine Woodland and Parkland, Rocky Mountain Subalpine-Upper Montane Grassland, Rocky Mountain Montane Douglas-fir Forest and Woodland, Rocky Mountain Subalpine Dry-Mesic Spruce-Fir Forest and Woodland, Rocky Mountain Lower Montane, Foothill, and Valley Grassland, Rocky Mountain Subalpine-Montane Riparian Shrubland, Commonly Associated with these Ecological Systems, Occasionally Associated with these Ecological Systems, Web Search Engines for Articles on "Long-styled Thistle". Some of these species are exotics (not native to Montana) and some species have … The basal leaves are shallowly lobed, moderately spiny, green and glabrous above, and densely white-hairy below; the lower leaves are narrowly lance-shaped, up to 15 cm long, and lobed to 1/3 or less the leaf width. They are also known as musk thistle or bristle thistle. As always, if you intend to use this product ensure that you meet the requirements of the label. Home / Musk Thistle. Pine Siskin feeding on Musk Thistle. On first-glance thistles can look similar, but upon closer inspection differences become apparent. My question to you is: what treatment do you suggest for the Canadian Thistle in an attempt to eradicate or at least minimize? The white disk flowers are 20-22 mm long; ray flowers are absent. View in other NatureServe Network Field Guides. The smaller upper leaves are more ovate in outline with mostly entire margins and numerous marginal spines; the herbage is covered with long, tangled, white hairs. I cut these down when the thistle head had formed but had yet to open. Title: American Goldfinch male on a thistle with ants and aphids, Location: Wasatch Mountains, Summit County, Utah, Title: Male American Goldfinch feasting on aphids, Title: Immature Yellow Warbler lifting off from a thistle, Title: Immature Yellow Warbler fluttering its wings, Title: Immature Yellow Warbler foraging on thistles, Title: Immature Yellow Warbler and thistles, Title: Immature Yellow Warbler perched on a thistle, Title: American Goldfinch male lifting off, Location: Wasatch Mountains, Morgan County, Utah, Title: Pine Siskin feeding on Musk Thistle, Title: Molting American Goldfinch eating a Musk Thistle seed, Title: Molting American Goldfinch perched on a Musk Thistle, Title: Male American Goldfinch lifting off, Title: Female American Goldfinch lifting off, Title: Great Spangled Fritillary female on a Musk Thistle, Title: Female Great Spangled Fritillary nectaring on Musk Thistle, Title: Male American Goldfinch perched on a dried Musk Thistle blossom. Pine Siskin Images. You can download select species by searching or when you're on a Taxa page like Class, Order, and Family. Also of benefit at this time is the active weed control program employed by the private landowners on their lands. Population estimates of approximately 30,000 plants, including seven high quality populations, scattered over four mountain ranges are promising for the long-term viability of the species. First found in Nebraska in the 1930’s, this statewide noxious weed is alive and doing well this spring. Title: Pine Siskin feeding on Musk Thistle. I cut thistles down prior to their head flowering. Score1 - Moderate: Species is restricted to a specific habitat that is more widely distributed or to several restricted habitats and is typically dependent upon relatively unaltered, good-quality habitat (C Values of 5-7). For the Musk Thistle's, I walked 40 acres with hedge shear and cut the stalks off about 4" above the ground then sprayed round-up down each stalk. The first thing to do is to ensure that the species is truly musk thistle. Endemic to central Montana with extant populations in Broadwater, Cascade, Judith Basin, Lewis & Clark, Meagher and Wheatland counties. Look for this PDF icon at the top of each page as you search and browse. Red Rock Lakes NWR, Montana; Make My Photo Noodle; Musk Thistle. Habitat in the largest populations is generally of high quality with few if any problem weeds posing significant and immediate threats. Date: 8/15/2018. Because Canada thistle is a creeping perennial the "root" of the issue is the roots. Here's some links if you want to download a whole group. Considering how widespread "rhinos" are, this weevil is clearly the best choice for musk thistle control. Alternatively, a very successful product that many of our professional managers use is aminopyralid or Milestone as it is known in the trade. Do you have any suggestions at the most effective elimination methods. MUSK THISTLE CONTROL The musk thistle control season is now upon us. A more selective option would be aminopyralid (Milestone). Montana has 12 species of Cirsium, and only 6 are described below. Musk thistle is a foreign invader which has caused serious infestation problems in pastures and roadside areas of Nebraska. Effective muck thistle control can be achieved through many chemical options; however, more importantly is finding an option that does not injure the desirable vegetation.
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