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Cal-IPC: California Invasive Plant Inventory Database List; USDA PLANTS Database: California State Noxious Weeds List; Cal-IPC: California Invasive Plant Council homepage + information. Cal-IPC: CalWeedMapper; California Native Plant Society—CNPS: Invasive Weeds + links. UC IPM" Invasive Plants of California — managing invasive plants.
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]
It is an invasive exotic weed in the United States, with significant infestations in California, Arizona, New Mexico, and Texas. It is listed as a Federal Noxious Weed by the United States Department of Agriculture. It is also a common weed in parts of Australia, New Zealand, and Mexico, and it thrives in any area with a Mediterranean climate.
In the U.S. state of Washington, it is listed as a Class B Noxious Weed and therefore banned from sale by state law. [61] [62] [63] It is also a B-listed Noxious Weed in the state of Oregon. [64] The variegated yellow archangel (Lamium galeobdolon subsp. argentatum) has become an invasive subspecies in several European countries.
The trees were banned in 2023 and are also included in Ohio's list of invasive plants. In November of 2021, Pennsylvania added the Bradford pear to its "Noxious Weed," list , which makes it ...
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. The ...
The Washington State Noxious Weed Control Board has created an online weed search form that allows you to enter the habitat, color, leaf arrangement or if known, the name of the plant to identify ...
In North America, tall waterhemp is considered a major weed of agricultural fields and other disturbed habitats. [11] The Southern Weed Science Society includes tall waterhemp on their list of weed species. [21] However, it is not listed on the federal noxious weed list or any state lists in the United States. [22]