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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.
Privets are any of a number of shrubs or trees in the genus Ligustrum, many of which are invasive. The genus contains about 50 species [1] native to the Old World and Australasia. [2] Many members of the genus are grown as ornamental plants in parts of the world. Several species of privet have become a nuisance in regions outside their ranges.
Invasive species may be plants, animals, fungi, and microbes; some include native species that have invaded human habitats such as farms and landscapes. [5] Some broaden the term to include indigenous or "native" species that have colonized natural areas. [ 4 ]
However, some plants grow a little too well. “Invasive plants spread aggressively and cause environmental changes, such as the elimination of native plant populations,” says Justine Kandra ...
Selective weed control balances traditional lawn ... but not all weeds are bad. Learning the benefits and challenges of different weed species is a good place to start when it comes to determining ...
Washington is home to over 140 noxious weeds that can be toxic to humans and damage habitats and wildlife. Noxious weeds are defined as “invasive, non-native plants that threaten agricultural ...
In 1993, the OTA estimated that a total of $100 million is invested annually in invasive species aquatic weed control in the U.S. [19] Introduced rats cause more than $19 billion per year in damages, [20] exotic fish cause up to $5.4 billion annually, and the total costs of introduced weeds are estimated at around $27 billion annually. [21]
By 1997, the vine was placed on the "Federal Noxious Weed List". [5] [7] Kudzu was removed from the list of Federal Noxious Weeds in 2000 with the repeal of sections 2801 through 2813 of the Federal Noxious Weed Act of 1974, which were superseded by updated legislation; however it is still listed as a noxious weed in various states.