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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.
The plant can be found growing in hedges and waste places, limestone scree and as a garden weed. [21] [22] G. aparine prefers moist soils and can exist in areas with poor drainage. It reportedly flourishes in heavy soils with above-average nitrogen and phosphorus content, and prefers soils with a pH value between 5.5 and 8.0.
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 ...
It now is a noxious weed throughout North America, dominating disturbed habitats such as roadsides, cultivated fields, eroded slopes, and arid regions with sparse vegetation. Though it is a troublesome weed, Kali tragus also provides useful livestock forage on arid rangelands. [9]
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]
[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]
The species has been calculated as the 8th most expensive invasive species in terms of cost to Australian farmers, at over A$500m over 60 years. [34] It is also legislated as a noxious weed in New Zealand, where farmers sometimes bring in helicopters to spray their farms if the ragwort is too widespread. [citation needed]
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 .