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The federal government defines noxious weeds under the Federal Noxious Weed Act of 1974. Noxious weeds are also defined by the state governments in the United States. [26] Noxious weeds came to the U.S. by way of colonization. [27] Some wildflowers are lesser known noxious weeds. A few of them are banned in certain states. [28]
[citation needed] In Britain and Ireland, where it is native, it is listed as a noxious weed. [13] Ragwort is abundant in waste land, waysides and grazing pastures. [14] Its natural habitat is sand dunes, but it is commonly found along road sides, railways and in light, low fertility soil. [15]
It now is a noxious weed throughout North America, dominating disturbed habitats such as roadsides, cultivated fields, eroded slopes, and arid regions with sparse vegetation. Though it is a troublesome weed, Kali tragus also provides useful livestock forage on arid rangelands. [9]
Cogongrass, one of the 10 worst weeds in the world, was recently identified in Idaho’s Foothills. This is the first case of cogongrass in the western United States An aggressive weed infesting ...
An aggressive and hardy invasive species, T. terrestris is widely known as a noxious weed because of its small woody fruit – the bur – having long sharp and strong spines which easily penetrate surfaces, such as bare feet or thin shoes of crop workers and other pedestrians, the rubber of bicycle tires, and the mouths and skin of grazing ...
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Chondrilla juncea is a species of flowering plant in the family Asteraceae known by a number of common names, including rush skeletonweed, gum succory, devil's grass, and nakedweed.
The species is found in North America. Although commonly eaten by animals, with birds consuming the seeds, T. radicans is considered a noxious weed. As a poison ivy, if causes urushiol-induced contact dermatitis in most people who touch it, producing an itchy, irritating, and sometimes painful rash.