Weed control

Weed control is the management of unwanted plants that compete with crops or interfere with production, using preventive, cultural, mechanical, biological, or chemical methods.

Herbicide: A chemical substance used to kill or suppress unwanted plants. Herbicides suppress weeds through chemical action rather than physical removal.
Precision agriculture: Agricultural management that uses detailed spatial data and technology to tailor field operations. Weed maps and targeted applications can reduce unnecessary herbicide use.
Herbicide resistance evolution: The increase of heritable herbicide-survival traits in weed populations under repeated selection. Repeated chemical control can make formerly effective treatments fail.
Mechanical weed control: The suppression or removal of weeds using physical tools or machinery. Mechanical methods contrast with chemical control by physically disturbing or removing plants.
Tillage: The mechanical preparation or cultivation of soil, often by turning or disturbing it. Tillage buries, uproots, or disrupts weeds, though it can also bring buried seeds to the surface.
Herbicide resistance: The inherited ability of a weed population to survive a herbicide dose that once controlled it. Repeated use of the same herbicide selects resistant weeds and changes control choices.
Soil erosion: The displacement of soil by water, wind, or other forces. Intensive cultivation for weed removal can leave soil exposed to erosion.
Chemical weed control: The suppression of weeds through herbicides or other chemical treatments. Chemical control can treat large areas efficiently but risks resistance and off-target exposure.
Crop rotation: The practice of growing different crops in sequence on the same land. Changing crops disrupts weed species adapted to one crop and its management routine.
Weed seedbank: The reserve of viable weed seeds and other propagules in soil. Management must limit seed production and emergence to deplete this persistent reserve.

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