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Packera aurea (formerly Senecio aureus), commonly known as golden ragwort or simply ragwort, is a perennial flower in the family Asteraceae.. It is also known as golden groundsel, squaw weed, life root, golden Senecio, uncum, uncum root, waw weed, false valerian, cough weed, female regulator, cocash weed, ragweed, staggerwort, and St. James wort.
In the United Kingdom, common ragwort (Senecio jacobaea) is one of the five plants named as an injurious weed under the provisions of the Weeds Act 1959. The word injurious in this context indicates that it could be harmful to agriculture, not that it is dangerous to animals, as all the other injurious weeds listed are non-toxic.
It is variously known as the woodland ragwort, [1] heath groundsel, [2] or mountain common groundsel. [3] It is native to Eurasia , and it can be found in other places, including western and eastern sections of North America, as an introduced species and an occasional roadside weed.
The beetle is most effective when used in conjunction with the cinnabar moth (Tyria jacobaeae), another ragwort biocontrol agent. The beetle is not known to attack other plants. A close relative, Longitarsus ganglbaueri, which also feeds on ragwort, does attack other plant species; it is not used as a biocontrol agent for this reason.
The amount at which cannabis can become poisonous can depend on multiple personal factors, but some studies have indicated people should wait at least three hours before taking a second dose ...
The LD 50 (median lethal dose) for pure oxalic acid in rats is about 375 mg/kg body weight, [29] or about 25 grams for a 65-kilogram (143 lb) human. Although the oxalic acid content of rhubarb leaves can vary, a typical value is about 0.5%, [ 30 ] so almost 5 kg of the extremely sour leaves would have to be consumed to reach the LD 50 .
A mature cotton thistle, an invasive weed in Australia.. A noxious weed, harmful weed or injurious weed is a weed that has been designated by an agricultural or other governing authority as a plant that is harmful to agricultural or horticultural crops, natural habitats or ecosystems, or humans or livestock.
Glufosinate use in the USA in 2018. Glufosinate is a broad-spectrum herbicide that is used to control important weeds such as morning glories, hemp sesbania (Sesbania bispinosa), Pennsylvania smartweed (Polygonum pensylvanicum) and yellow nutsedge similar to glyphosate.