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In Washington state, the gangly invasive weed is often mistaken for Queen Anne’s Lace, wild carrot or cow parsley. The plant’s discovery can trigger a public response, as state law requires ...
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 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]
It is capable of spreading and thereby becoming an invasive weed. All parts of the plant are toxic , especially the seeds and roots, and especially when ingested. Under the right conditions the plant grows quite rapidly during the growing season and can reach heights of 2.4 metres (8 feet), with a long penetrating root .
Noxious weeds can be deadly for humans, animals and other plants in your garden. Here’s how to identify a plants before you get hurt. Noxious weeds can be deadly for humans, animals and other ...
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Noxious Weeds in 2000 with the repeal of sections 2801 through 2813 of the Federal Noxious Weed Act of 1974, which were superseded by updated legislation; however it is still listed as a noxious weed in various states.
[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.
Tripleurospermum inodorum has been classified as a noxious weed (class C) in the state of Washington [11] and is considered invasive in other states (it is resistant to some herbicides); it is a weed of cereals in western Canada.