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A toxic nonpersistent strong contact herbicide, C12H12N2, usually formulated as its yellow crystalline dibromide salt.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Chemistry) a toxic chemical used as a herbicide, belonging to the same class of quaternary compounds as paraquat
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
A series of trials is taking place on potato farms to look at effective alternatives for banned chemicals such as diquat and CIPC.
Research into desiccants has also been going ahead as part of AHDB's national campaign, which is looking at alternatives following the loss of Diquat.
Producao e qualidade fisiologica de semente de feijao apos aplicacao do herbicida Diquat. Semina: Ciencias Agrarias, v.34, p.1707-1714, 2013.
Huang et al., "A host-guest complexation based fluorescent probe for the detection of paraquat and diquat herbicides in aqueous solutions," RSC Advances, vol.
[6] WHO, "Environmental Health Criteria 39," in Proceedings of the International Program on Chemical Safety (IPCS), Paraquat and diquat, Geneva, Switzerland, 1984.
The 20 most frequently used active ingredients in the period 2012-2016 were Glyphosate (herbicide), Chlorpyrifos (insecticide), 2.4-D (herbicide), Atrazine (herbicide), mineral oil (adjuvant), Mancozeb (fungicide), Methoxyfenozide (Insecticide), Acephate (insecticide), Haloxyfop-P-methyl (herbicide), Lactofen (herbicide), Methomyl (insecticide), Diquat (herbicide), Picoxystrobin (fungicide), Flumetsulam (herbicide), Teflubenzuron (insecticide), Imidacloprid (insecticide), Lambda-cyhalothrin (insecticide), Imazethapyr (herbicide), Azoxystrobin (Fungicide) and Flutriafol (Fungicide).
Immediately before sowing, Spray.Seed 250 (active ingredients (a.i.s) 11.5% w/v paraquat dichloride, 9.8% diquat dibromide, Syngenta) was applied at 2 L [ha.sup.-1], Treflan 480 (a.i.