What does diuron mean?
Diuron is a synthetic herbicide belonging to the substituted-urea family of chemicals, identified chemically as 3-(3,4-dichlorophenyl)-1,1-dimethylurea. It works by blocking photosynthesis: after being absorbed through plant roots or leaves, it prevents the plant from converting light into energy, so treated weeds gradually die off. Introduced in the mid-twentieth century, diuron has been widely used in agriculture — on orchards, vineyards, cotton, and along roadsides and railway lines — as well as for controlling algae in water systems. In scientific and regulatory writing the word functions as an uncountable technical noun, appearing chiefly in discussions of application rates, soil persistence, and residue monitoring. Its tendency to linger in soils and surface waters has made it a subject of environmental concern and restrictions in several countries. For readers outside farming or chemistry, diuron is worth knowing primarily because it recurs in reporting on water quality and pesticide regulation.
nounA synthetic herbicide of the substituted-urea class (chemically 3-(3,4-dichlorophenyl)-1,1-dimethylurea), used to kill weeds and algae by inhibiting photosynthesis.
- A white crystalline substituted-urea herbicide used to control broadleaf and grassy weeds in agriculture and to inhibit algae growth.
"The vineyard's soil was treated with diuron to suppress weed growth between the rows."
"Farmers applied diuron before planting to keep the fields free of annual weeds."
"Water-quality monitoring detected traces of diuron in the river downstream of the orchards."
Rarely used; diuron is normally treated as an uncountable chemical name. A plural may occasionally appear when referring to different commercial formulations or measured samples.
"The lab analyzed several formulations containing diurons of varying purity."
Diuron doesn't poison plants outright — it simply switches off their ability to photosynthesize, starving them to death by sunlight deprivation.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of diuron
The name diuron is a coined chemical term formed from 'di-', indicating the two chlorine atoms on its phenyl ring, combined with '-uron', derived from 'urea', the compound at the heart of its molecular structure. The 'urea' element ultimately traces back to Greek 'ouron', meaning urine, since urea was first isolated from that substance. The name follows the naming pattern of related substituted-urea herbicides such as monuron and linuron, which were developed alongside it.
How diuron is actually used
Diuron is a technical term used mainly in agricultural science, environmental chemistry, and regulatory contexts rather than everyday conversation. Because it is an uncountable mass noun referring to a chemical substance, it normally takes no plural and no indefinite article. It often carries neutral-to-negative connotations in environmental discussions due to its persistence in waterways.
Easily confused with diuron
Durian is a large, strongly scented tropical fruit, whereas diuron is a synthetic herbicide; the two share a similar spelling but nothing else.