diquat

noun

di·​quat ˈdī-ˌkwät 

: a powerful herbicide and plant desiccant C₁₂H₁₂Br₂N₂ used especially to control aquatic weeds and to desiccate aerial plant parts (as of potatoes) before harvesting

Examples of diquat in a Sentence

Recent Examples on the Web

The strategy the group would use would include releasing two herbicides — diquat and fluoridone — into the lakes and maintaining high enough concentrations for long enough to kill the elodea. — Author: Elizabeth Earl, Anchorage Daily News, 20 June 2019

Duckweed and watermeal are just two types of weeds that most pond owners seek to control with chemicals such as diquat. — Hector Argüello Canals, National Geographic, 17 June 2016

Word History

Etymology

di- + quaternary

First Known Use

1960, in the meaning defined above