#herbicide__weedkiller__weed_killer  a chemical agent that destroys plants or inhibits their growth
  supertype:  #chemical  produced by or used in a reaction involving changes in atoms or molecules
  substance:  #arsenic
  subtype:  #Agent_Orange  a herbicide used in the Vietnam War to defoliate forest areas
  subtype:  #paraquat  a poisonous yellow solid used in solution as a herbicide
  subtype:  #silvex  a herbicide that is effective in controlling woody plants but is toxic to animals
  subtype:  #simazine  a herbicide used to control weeds (especially among crops)

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