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This is a parasitic noxious weed, Striga gesnerioides, commonly called Witchweed. This is a terrestrial noxious weed, Drymaria arenarioides commonly called Lightning weed. It is sometimes confused with daisies. Some noxious weeds are harmful or poisonous to humans, domesticated grazing animals, and wildlife. Open fields and grazing pastures ...
The Federal Noxious Weed Act of 1974 ("FNWA", Pub. L. 93–629, 88 Stat. 2148, enacted January 3, 1975) established a federal program to control the spread of noxious weeds. The United States Secretary of Agriculture was given the authority to declare plants "noxious weeds", and limit the interstate spread of such plants without a permit.
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]
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 ...
A Class 2 weed, Salvinia molesta is regionally prohibited and should be eradicated from the land. A Class 3 weed, land managers should minimise the risk of introducing or spreading Cestrum parqui. A Class 4 weed, Anredera cordifolia must not be sold or imported into the state. This is the Noxious Weeds Act 1993: [4] [5]
Cuscuta japonica, commonly known as Japanese dodder, is a parasitic vine.It has been listed by the State of California as a noxious weed. [3] It has a range of effects on its host [4] and has repeatedly been introduced to the United States of America. [5]
Noxious describes any happening that is perceived as harmful. It may also refer to: Poison, substances that can harm or kill; Noxious weed, a plant designated by the government as injurious to public health, agriculture, recreation, wildlife or property
Mimosa pigra is a noxious weed, which has received international recognition because of its existing and potential impact on biological diversity.In Australia it further affects traditional and non-traditional land use, and the sustainability of agriculture and tourism.