Article: plumeless thistle control
December 22, 2020 | Uncategorized
The three most common invasive thistle species are: Canada thistle, bull thistle, and plumeless thistle. Timing, as with other biennials, is very important in control. Noxious Weeds of Nebraska: Plumeless Thistle ; Noxious Weeds of Nebraska: Canada Thistle ; Noxious Weeds of Nebraska: Musk Thistle Not noxious but is poisonous. General. Lobe tips have stout spines. Plumeless Thistle. You can control poison hemlock by using 2,4-D or by hand pulling. Plumeless thistle, Carduus acanthoides L., is an introduced Eurasian noxious weed in pastures, rangelands, croplands, and along highways in 19 of the contiguous states in the United States (Frick, 1978). When in meadows and pastures, grazing animals avoid plumeless thistle and focus on native plants giving the invasive the upper hand. There are some biological controls that work on the thistles. Any chemical that will control broadleaf weeds such as 2,4-D, and Tordon will control musk and plumeless thistle and leave the native grasses unharmed. Poison hemlock Stands upright. The musk thistle crown weevil, T. horridus , is reported to be very effective against plumeless thistle, although control is ⦠Common names: spiny plumeless thistle, welted thistle; Ecological threat. Carduus acanthoides. Infest low-quality areas first, such as roadsides, disturbed areas, ditch banks and old fields. Control. Umbrella-like flowers. Minnesota has many varieties of thistle species, some are native and others are invasive. Control of plumeless thistle with R. conicus and T. horridus takes approximately twice as long as control of nodding thistle. Development and reproduction of the three thistle herbivores are not adversely affected by the rust. The first three offer biology, identification, distribution information, including illustrated growth cycles and photos to aid in plant and pest identification, and control recommendations. Control of plumeless thistle with R. conicus and T. horridus takes approximately twice as long as control of nodding thistle. Biennial (short-lived perennial) Family: Sunflower (Asteraceae) Herbaceous; Rosettes formed the first year and bolt early in May to June of the next year. Lace-like leaves. Habitat Plumeless thistle is a herbaceous biennial. In: Van Driesche, R., et al.., 2002, Biological Control of Invasive Plants in the Eastern United States, USDA Forest Service Publication FHTET-2002-04, 413 p. Pest Status of Weed. Leaves are smooth above and hairy below. Development and reproduction of the three thistle herbivores are not adversely affected by the rust. Stem leaves are alternate and coarsely lobed. Control You can control plumeless thistle by using Stinger, 2,4-D or Banvel. The thistle head weevil, R. conicus, weevil provides only partial control of plumeless thistle, and has been documented to develop on native non-target thistles. Plumeless thistle closely resembles musk thistle; however, the flowers are smaller and donât nod, and the leaves are more deeply serrated with hairy undersides. The rust hastens plant senescence and reduces seed production. All three are identified by the bright purple flowering head, each with a different inflorescence. Plumeless thistle Carduus acanthoides Chemical control Herbicide: Weedar (2, 4-D amine) Description: Apply 2 to 4 pt/A 2,4-D amine Timing: Rosette to bolting stages Herbicide: Banvel, Clarity, Vanquish (dicamba) Description: Apply 0.5 to 1 lb ae/A dicamba Timing: Rosette stage Herbicide: Escort XP (metsulfuron) Plumeless and musk thistles will hybridize. The rust hastens plant senescence and reduces seed production. Stems are spiny winged. 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