Herbicide
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Herbicides, also commonly known as weed killers, are substances used to control undesired plants, also known as weeds. Selective herbicides control specific weed species while leaving the desired crop
A field after application of a herbicide
Weeds controlled with herbicide
Herbicides being sprayed from the spray arms of a tractor in North Dakota.
Handicapped children in Vietnam, most of them victims of Agent Orange, 2004
Weed
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A weed is a plant considered undesirable in a particular situation, growing where it conflicts with human preferences, needs, or goals. Plants with characteristics that make them hazardous, aesthetica
Herbicide
…Herbicides (US: , UK: ), also commonly known as weed killers, are substances used to control undesired plants, also known as weeds. Selective herbicides control specific weed species while leaving the desired crop relatively unharmed, while non-selective herbicides (sometimes called…
Weeds growing in the cracks of a concrete staircase (Epilobium roseum, Chelidonium majus, Oxalis corniculata, Plantago major)
A dandelion is a common plant all over the world, especially in Europe, Asia, and the Americas. It is considered a weed in some contexts (such as lawns) but not others (such as when it is grown as a vegetable or herbal medicine).
Invasive Canada Goldenrod as a roadside weed in Poland
Australia, 1907: Cattlemen survey 700 carcasses of cattle that were killed overnight by a poisonous plant.