they hitch hiked on trains and boats
why do we classify weeds
Noxious weed is the umbrella name for a group of weeds that are hazardous to crops, humans and/or habitats. For a list of many of the plants that are classified as noxious weeds, please refer to the related link.
When a plant is in a place where it is not wanted, it is categorized as a weed. www.dictionary.com - A plant considered undesirable, unattractive, or troublesome, especially one growing where it is not wanted, as in a garden.
Edward C. Monnig has written: 'Human health risk assessment of herbicide applications to control noxious weeds and poisonous plants in the Northern Region' -- subject(s): Control, Herbicides, Weeds, Toxicology, Plants, Effect of herbicides on, Health risk assessment 'A summary of the status of biological control of major noxious weed species in Idaho, Montana, and North Dakota' -- subject(s): Noxious weeds, Biological control
noxious fumes are dangerous and can kill us
No. Oxygen is not noxious because it does not harm us or any living thing in any way.
Fluorine is very noxious/toxic.
The car's exhaust fumes are noxious!
Do not inhale noxious gases, they are bad for you
A goat's main job on the farm is to eat weeds, keeping them in control. Several of these weeds are noxious or toxic to other animals. Also on some farms goats pull small carts and haul things. The other job a goat has depending on its breed is to produce kids, produce milk, fibre and/or meat.
Beware of noxious fumes when working with volatile liquids in confined areas.
Herbicide - CropCare Reglone® Active Constituent: 200 g/L Diquat present as Diquat Dibromide Monohydrate Solvent: Not stated Rate: 400 mL plus 150 mL Agral® per 100L water Application method: Spray to wet weeds thoroughly. Approx 1 mL Reglone per square metre Withholding period: 10 days for human consumption, livestock watering or irrigation purposes. Comment: Desiccant. Very rapid brownout. Use on moving waters, or where Salvinia growing in mud. Information taken from - "The Far North Coast Weeds" is the Local Control Authority under the Noxious Weeds Act 1993 responsible for the control of Noxious Weeds in the Ballina, Byron, Copmanhurst, Kyogle, Lismore, Richmond Valley and Tweed Local Government Council areas.