A synthetic compound used in controlling plant growth, often as a nonpersistent contact herbicide.
- ‘EPA has found diquat to potentially cause the following health effects.’
- ‘Victor Oreffo (AstraZeneca, Loughborough, UK) presented results on gene expression analysis following in vivo or in vitro exposure to the oxidative stress agents menadione and diquat.’
- ‘Cost of treating hydrilla with diquat or Sonar is about $1, 000 an acre.’
1960s: from di- two + quaternary.