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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]
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 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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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 ...
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 ...
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.