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From late 1979 to mid-1981, Iowa's administrative rules allowed for medical use of marijuana through a therapeutic research center. [ 10 ] 2014: Legalization of CBD oil
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 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. [31] Noxious weeds came to the U.S. by way of colonization. [32] Some wildflowers are lesser known noxious weeds. A few of them are banned in certain states. [33]
It spreads through the seeds contaminating crop seeds, and sticking to clothing. It is classified as an "injurious weed" under the UK Weeds Act 1959. [8] In the United States, it is classified as a noxious weed in the states of Arkansas and Iowa. [9] It is often seen in disturbed soils at the edges of roadsides, railway beds, and car parks.
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]
In the State of Washington, I. capensis is considered a class-C noxious weed due to its rapid spread and tendency to outcompete native jewelweeds. [13] It has also formed a hybrid species with the native jewelweed Impatiens ecornuta. [14]
[2] [3] [4] It is considered to be one of the ten worst weeds in the world. [5] In the United States, Johnson grass is listed as either a noxious or quarantined weed in 19 states. [6] With Sorghum bicolor it is a parent of Sorghum × almum, a forage crop also considered a weed in places. [7]
Solanum elaeagnifolium, the silverleaf nightshade [1] or silver-leaved nightshade, is a species of plant in the nightshade family native to North and South America. It is common in parts of southwestern USA, and sometimes weed of western North America.