Crop Protection Database

Herbicides > Sulfonylurea Herbicides

Summary | Products

Sulfonylureas are a family of environmentally compatible herbicides that were discovered by DuPont Crop Protection in 1975 and first commercialized for wheat and barley crops in 1982. They have now been developed and commercialized worldwide in all major agronomic crops and for many specialty uses (e.g., rangeland/pasture, forestry, vegetation management).

Sulfonylureas represent a major advance in global crop protection technology and have revolutionized weed control by introducing a unique mode of action. Specifically, these compounds interfere with a key enzyme required for weed cell growth — acetolactate synthase. Furthermore, sulfonylureas are compatible with the global trend toward post emergence weed control and integrated pest management.

The invention of sulfonylurea herbicides, in June 1975, by George Levitt of DuPont revolutionized the use of herbicides and facilitated a change in direction in DuPont's corporate strategy from chemicals to life sciences. The company had been in agrichemicals since 1928, but the business had remained a small part of its portfolio. In the early 1970s, agrichemicals provided DuPont a strong rate of return, but its potential had yet to be fully exploited. Levitt's pioneering invention, made in this small business, came from his insight and creativity, and his supervisor's encouragement to explore. But DuPont would have profited only modestly from sulfonylurea herbicides were it not for a new research manager willing to take a risk and ramp up an innovation program that was being curtailed. Soon, the program grew further as DuPont's corporate strategy changed and sulfonylureas presented an immediate opportunity for the company to expand its presence in life sciences. The growing agrichemicals business also adopted a new research strategy to improve productivity. DuPont thus built a sustained program of innovation to realize a pioneering invention's scientific and commercial promise.

There was no precedence for the high potency – and thus low application rates – of sulfonylurea herbicides when they went into field tests in the mid-1970s. A field agent thought the manager prescribing the low rate was "nuts". Others conducting early field tests at a university concluded that there had to be an error in the instructions. Herbicides were normally applied at rates of a few kilograms/hectare, not the few grams/hectare suggested. That was unheard of. So, they moved the decimal point by two places, thereby increasing the application rate 100-fold. Two years later, weeds would still not grow in the test plot, despite the herbicide's having a half-life of about 6 to 8 weeks.

Sulfonylurea herbicides kill weeds by inhibiting the enzyme acetolactate synthase, which is essential to their growth. They work on a broad range of grasses and broadleaf weeds, but not on crops they are designed to protect. Crops like rice, wheat, barley, soybean, maize, and many others are able to metabolize sulfonylureas safely. And the herbicides are safe for humans and animals because they do not have the enzyme sulfonylurea molecules target. Owing to their low application rates, it is estimated that farmers now use around 1 to 5% of the quantity of herbicides used before sulfonylureas, and overall herbicide usage is estimated to be less by about 200 million pounds per year. Sulfonylureas replaced herbicides that were less safe and effective, and were used in larger quantities. Combined with the low application rates, selectivity for a variety of crops, and short half-life, sulfonylurea herbicides were a revolutionary advance in agrichemicals and an important cornerstone of DuPont's change in corporate strategy in the 1980s.

Products ( 55 )
Product NameCAS No.Category
Iofensulfuron
1144097-22-2Herbicides > Sulfonylurea Herbicides
Trifloxysulfuron
三氟啶磺隆
145099-21-4,199119-58-9Herbicides > Sulfonylurea Herbicides
Triflusulfuron
氟胺磺隆
135990-29-3Herbicides > Sulfonylurea Herbicides
Nicosulfuron
烟嘧磺隆
111991-09-4Herbicides > Sulfonylurea Herbicides
Bensulfuron
苄嘧磺隆
99283-01-9Herbicides > Sulfonylurea Herbicides
Triflusulfuron-methyl
氟胺磺隆
126535-15-7Herbicides > Sulfonylurea Herbicides
Trifloxysulfuron-sodium
三氟啶磺隆钠盐
199119-58-9Herbicides > Sulfonylurea Herbicides
Tribenuron-methyl
苯磺隆
101200-48-0Herbicides > Sulfonylurea Herbicides
Thifensulfuron-methyl
噻吩磺隆
79277-27-3Herbicides > Sulfonylurea Herbicides
Sulfometuron-methyl
甲嘧磺隆
74222-97-2Herbicides > Sulfonylurea Herbicides
Pyrazosulfuron-ethyl
吡嘧磺隆
93697-74-6Herbicides > Pyrazole herbicides
Herbicides > Sulfonylurea Herbicides
Metsulfuron-methyl
甲磺隆
74223-64-6Herbicides > Sulfonylurea Herbicides
Mesosulfuron-methyl
甲基二磺隆
208465-21-8Herbicides > Sulfonylurea Herbicides
Herbicides > Sulfonylurea Herbicides
Iodosulfuron-methyl-sodium
甲基碘磺隆钠盐
¹44550-³6-7Herbicides > Sulfonylurea Herbicides
Halosulfuron-methyl
氯吡嘧磺隆
100784-20-1Herbicides > Sulfonylurea Herbicides
Herbicides > Pyrazole herbicides
Flupyrsulfuron-methyl-sodium
氟啶嘧磺隆
144740-54-5Herbicides > Sulfonylurea Herbicides
Ethametsulfuron-methyl
97780-06-8Herbicides > Sulfonylurea Herbicides
Chlorimuron-ethyl
氯嘧磺隆
90982-32-4Herbicides > Sulfonylurea Herbicides
Bensulfuron-methyl
苄嘧磺隆
83055-99-6Herbicides > Sulfonylurea Herbicides
Asulam-sodium
2302-17-2Herbicides > Carbamate herbicides
Herbicides > Sulfonylurea Herbicides
Tritosulfuron
三氟甲磺隆
142469-14-5Herbicides > Sulfonylurea Herbicides
Tribenuron
苯磺隆
106040-48-6Herbicides > Sulfonylurea Herbicides
Triasulfuron
醚苯磺隆
82097-50-5Herbicides > Sulfonylurea Herbicides
Thifensulfuron
噻吩磺隆
79277-67-1Herbicides > Sulfonylurea Herbicides
Sulfosulfuron
磺酰磺隆
141776-32-1Herbicides > Sulfonylurea Herbicides
Sulfometuron
甲嘧磺隆
74223-56-6Herbicides > Sulfonylurea Herbicides
Rimsulfuron
砜嘧磺隆
122931-48-0Herbicides > Sulfonylurea Herbicides
Pyroxsulam
啶磺草胺
422556-08-9Herbicides > Triazolopyrimidine herbicides
Herbicides > Pyridine herbicides
Herbicides > Sulfonylurea Herbicides
Herbicides > Amide herbicides
Pyrazosulfuron
吡嘧磺隆
98389-04-9Herbicides > Sulfonylurea Herbicides
Herbicides > Pyrazole herbicides
Prosulfuron
氟磺隆
94125-34-5Herbicides > Sulfonylurea Herbicides
Primisulfuron
氟嘧磺隆
113036-87-6Herbicides > Sulfonylurea Herbicides
Penoxsulam
五氟磺草胺
219714-96-2Herbicides > Triazolopyrimidine herbicides
Herbicides > Sulfonylurea Herbicides
Herbicides > Amide herbicides
Oxasulfuron
环氧嘧磺隆
144651-06-9Herbicides > Sulfonylurea Herbicides
Oryzalin
氨磺乐灵
19044-88-3Herbicides > Dinitroaniline herbicides
Herbicides > Sulfonylurea Herbicides
Herbicides > Amide herbicides
Orthosulfamuron
嘧苯胺磺隆
213464-77-8Herbicides > Sulfonylurea Herbicides
Metsulfuron
甲磺隆
79510-48-8Herbicides > Sulfonylurea Herbicides
Mesosulfuron
400852-66-6Herbicides > Sulfonylurea Herbicides
Iodosulfuron
185119-76-0Herbicides > Sulfonylurea Herbicides
Imazosulfuron
唑吡嘧磺隆
122548-33-8Herbicides > Sulfonylurea Herbicides
Halosulfuron
氯吡嘧磺隆
135397-30-7Herbicides > Pyrazole herbicides
Herbicides > Sulfonylurea Herbicides
Foramsulfuron
甲酰氨基嘧磺隆
173159-57-4Herbicides > Sulfonylurea Herbicides
Flupyrsulfuron
150315-10-9Herbicides > Sulfonylurea Herbicides
Flucetosulfuron
氟吡磺隆
412928-75-7Herbicides > Sulfonylurea Herbicides
Flazasulfuron
啶嘧磺隆
104040-78-0Herbicides > Sulfonylurea Herbicides
Fenasulam
78357-48-9Herbicides > Carbamate herbicides
Herbicides > Anilide herbicides
Herbicides > Sulfonylurea Herbicides
Herbicides > Amide herbicides
Ethoxysulfuron
乙氧磺隆
126801-58-9Herbicides > Sulfonylurea Herbicides
Ethametsulfuron
胺苯磺隆
111353-84-5Herbicides > Sulfonylurea Herbicides
Cyclosulfamuron
环丙嘧磺隆
136849-15-5Herbicides > Sulfonylurea Herbicides
Cinosulfuron
醚磺隆
94593-91-6Herbicides > Sulfonylurea Herbicides
Chlorsulfuron
氯磺隆
64902-72-3Herbicides > Sulfonylurea Herbicides
Chlorimuron
氯嘧磺隆
99283-00-8Herbicides > Sulfonylurea Herbicides
Carbasulam
1773-37-1Herbicides > Carbanilate herbicides
Herbicides > Sulfonylurea Herbicides
Herbicides > Amide herbicides
Azimsulfuron
四唑嘧磺隆
120162-55-2Herbicides > Sulfonylurea Herbicides
Herbicides > Pyrazole herbicides
Asulam
磺草灵
3337-71-1Herbicides > Carbamate herbicides
Herbicides > Sulfonylurea Herbicides
Herbicides > Amide herbicides
Amidosulfuron
酰嘧磺隆
120923-37-7Herbicides > Sulfonylurea Herbicides

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