: 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
After the use of the chemical diquat, the duckweed turns brown and sinks to the bottom, which can nourish unkilled weeds, effectively making matters worse.
—Hector Argüello Canals, National Geographic, 17 June 2016
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
Author: Elizabeth Earl, Anchorage Daily News, 20 June 2019
After the use of the chemical diquat, the duckweed turns brown and sinks to the bottom, which can nourish unkilled weeds, effectively making matters worse.
—Hector Argüello Canals, National Geographic, 17 June 2016
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
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'diquat.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
Etymology
di- + quaternary
First Known Use
1960, in the meaning defined above
Dictionary Entries Near diquat
Cite this Entry
“Diquat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diquat. Accessed 1 Dec. 2023.
Copy Citation
More from Merriam-Webster on diquat
Britannica.com: Encyclopedia article about diquat
Love words? Need even more definitions?
Merriam-Webster unabridged
Share