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It is capable of spreading and thereby becoming an invasive weed. All parts of the plant are toxic , especially the seeds and roots, and especially when ingested. Under the right conditions the plant grows quite rapidly during the growing season and can reach heights of 2.4 metres (8 feet), with a long penetrating root .
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]
Some weed species have been classified as noxious weeds by government authorities because, if left unchecked, they often compete with native or crop plants or cause harm to livestock. [41] They are often foreign species accidentally or imprudently imported into a region where there are few natural controls to limit their population and spread. [42]
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This species is well known as a noxious weed, both in its native range and in areas where it is an introduced and often invasive species. [7] [8] [9] It is naturalized in some areas, and it is recorded as an adventive species in others. [3] It grows in many types of disturbed habitat, such as roadsides, and in cultivated fields.
The most invasive plant in Texas is the common bermudagrass (Cynodon dactylon). In certain cases, like a lawn or grazing pasture, it is extremely valuable to the landowner. Common bermudagrass ...
A native of most of Europe, [25] North Africa and western Asia, O. umbellatum has been adopted as an ornamental garden plant from where it has escaped and naturalised widely in North America, [7] where it is considered an aggressive noxious weed of lawns, gardens and no-till agricultural land, which can be difficult to eradicate. [23]
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 ...