herbicide

/'hə:bisaid/
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herbicide

A farmer sprays herbicide on the weeds in his field.

Definition
  1. Noun:
    • A chemical substance used to kill unwanted plants: A herbicide is a chemical agent specifically formulated to destroy or inhibit the growth of plants, especially weeds, in agricultural, industrial, or residential settings.
Usage
  • Herbicides are applied to control vegetation in fields, gardens, roadsides, and other areas.
  • They are a key tool in modern agriculture to protect crops from weed competition.
  • Usage often involves specifying the target plants (e.g., "a broadleaf herbicide") or the method of action (e.g., "a systemic herbicide").
Examples
  • Noun:
    • The farmer sprayed a selective herbicide to kill the weeds without harming the corn.
    • Environmental groups are concerned about the runoff of herbicides into local waterways.
    • Using a non-selective herbicide will kill all vegetation it contacts.
Advanced Usage
  • "Pre-emergent herbicide": A herbicide applied to the soil to prevent weed seeds from germinating.
    • Gardeners often use a pre-emergent herbicide in early spring.
  • "Post-emergent herbicide": A herbicide applied to kill weeds that have already emerged and are growing.
    • The post-emergent herbicide was effective against the mature dandelions.
Variants and Related Words
  • Herbicidal (adj): Having the properties of a herbicide; relating to herbicides.
    • The herbicidal effect was evident within a week.
  • Weedkiller (n): A common synonym for herbicide, especially in non-technical contexts.
    • He bought a bottle of weedkiller for the patio.
Synonyms
  • Weedkiller: A substance that kills weeds.
  • Phytocide: A less common term for a substance that kills plants.
Related Phrases
  • "Herbicide resistance": The inherited ability of a plant to survive and reproduce following exposure to a dose of herbicide normally lethal to the wild type.
    • The emergence of herbicide-resistant weeds is a major agricultural challenge.
  • "Herbicide application": The act or process of applying a herbicide.
    • Proper herbicide application requires calibrated equipment.
herbicide

A farmer sprays herbicide on the weeds in his field.

Noun
  1. a chemical agent that destroys plants or inhibits their growth

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