di·​quat | \ ˈdī-ˌkwät How to pronounce diquat (audio) \

Definition of diquat

: 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

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diquat.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of diquat

1960, in the meaning defined above

History and Etymology for diquat

di- + quaternary

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Cite this Entry

“Diquat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diquat. Accessed 6 Jul. 2022.

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More from Merriam-Webster on diquat

Britannica.com: Encyclopedia article about diquat


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