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Positive identification of a Scotch thistle is easy – the sharp-edge, hairy leaves are a dead giveaway. Rosettes of leaves can reach up to 6 feet (2 m.) across and stems may grow from 6 to 8 feet (2 m.) tall.
- How do you control Scotch thistle?
- How do you identify Scotch thistle?
- What do you spray Scotch thistle with?
- How do you identify thistles?
- Why is Scotch thistle bad?
- How long do Scotch thistle seeds last?
- How long do thistle seeds last?
- Is Thistle a perennial?
- What is the meaning of Scottish thistle?
- Are thistles good for anything?
- What is Scotch thistle good for?
- What kills Scotch thistles?
How do you control Scotch thistle?
The use of a range of tools such as the maintenance of a strong perennial pasture, strategic herbicide application, chipping by hand and use of biological control agents where appropriate is the best strategy for long term control. The key to managing thistles is control of seed set.
How do you identify Scotch thistle?
Keys to Identification
- Up to 8 ft tall.
- Large, coarsely lobed, hairy leaves have a velvety-gray appearance.
- The rosette forms the first year and can have leaves up to 2 ft long and 1 ft wide.
- The spiny-edged, alternate leaves form leaf wings that extend down onto the stem.
What do you spray Scotch thistle with?
Spot Spray Application
| Stage of growth | Herbicide (active ingredient) | Application rate of commercial product |
|---|---|---|
| Up to early bud stage | MCPA/dicamba | 60 ml/15 L water |
| All Stages - while plant actively growing | Glyphosate | 75-100 ml/15 L water 50-70 mL/15 L water |
| 75 - 100 mL/15 L water | ||
| Early flowering | Clopyralid | 1 ml/L water |
How do you identify thistles?
Look for mostly hairless, green and oblong leaves that have edges with spine-tipped lobes to spot the yellow thistle (Cir. horridulum). The yellow thistle has thick, hairy, 2- to 5-foot stems and buff-yellow to reddish-purple flower heads that sit atop a whorl of spiny leaves.
Why is Scotch thistle bad?
It can invade healthy, undisturbed sites as well, out-competing desirable forbs and grasses in pastures and rangeland and reducing biodiversity. The sharp spines deter wildlife and livestock from grazing. Scotch thistle is considered a noxious weed in some counties of Nebraska and in some neighboring states.
How long do Scotch thistle seeds last?
The breathtaking, globe-shaped purple flowers are loved by many, but the seeds they produce can survive in the soil for up to 20 years.
How long do thistle seeds last?
Canadian thistle - rosettes require about 14-16 hours of day length to bolt and flower, produce about 1500 seeds per plant with the potential for the seeds to remain viable in the soil for approximately 20 years. About 90% of the seeds germinate within one year. Wind can disperse these seed up to 1/2 mile.
Is Thistle a perennial?
Flodman thistle is a deep-rooted perennial that is native to North America and usually grows 3 to 4 feet tall (Figure 5A). It occurs from Saskatchewan and Manitoba to Iowa and Colorado. Flodman thistle is more competitive than most other native species and has the potential to infest large areas.
What is the meaning of Scottish thistle?
Thistle (Onopordum acanthium) is actually part of the sunflower family. It's main claim to fame is being the national symbol for Scotland. ... Throughout Celtic regions thistle represents bravery, devotion, durability, strength and determination.
Are thistles good for anything?
Milk thistle is used as a natural remedy to treat a range of health conditions. ... Milk thistle is also known as Mary thistle or holy thistle. It is mainly used to treat liver problems, but some people claim it can lower cholesterol and help manage type 2 diabetes.
What is Scotch thistle good for?
Medicinal: The roots and a decoction of the plant is used as a poultice on sore jaws. A hot infusion of the whole plant has been used as a herbal steam for treating rheumatic joints. A decoction of the whole plant has been used both internally and externally to treat bleeding piles.
What kills Scotch thistles?
Selective herbicides such as 2,4-D are useful in grass pastures. Glyphosate is used in areas where killing surrounding plants is not a concern such as fallows or small areas. Broadacre spraying in winter, spring or summer on crops, fallow or pastures is effective against Onopordum thistles.
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