The information in this profile may be out-of-date. It was last revised in 1996. EXTOXNET no longer updates this information, but it may be useful as a reference or resource.

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Pesticide Information Profiles

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Revised 5/95


TRADE OR OTHER NAMES: Trade names for products containing nicosulfuron include Accent, Challenger, Dasul, Lama, Milagro, Mistral, Motivel, Nisshin and Sanson (37, 38).

REGULATORY STATUS: Nicosulfuron is a general use pesticide with a toxicity classification of IV (relatively non-toxic). Check with specific state regulations for local restrictions which may apply. Products containing nicosulfuron must bear the signal word "Caution" on their label (37).

INTRODUCTION: Nicosulfuron is a member of the sulfonylurea family of herbicides. It controls weeds by inhibiting the plant enzyme acetolactate synthase, or ALS. This enzyme is not found in livestock, fish or man. Inhibiting the ALS enzyme system blocks the production of the amino acids, valine and isoleucine, essential building blocks of proteins and other plant components (46). Nicosulfuron is applied postemergence with a non-ionic surfactant when weeds are 4-12 inches tall and actively growing. Rain within two hours of application will not decrease the effectiveness (38). Nicosulfuron is used for control of weeds such as Johnsongrass, quackgrass, foxtails, shattercane, panicums, barnyardgrass, sandbur, pigweed, morningglory and others. Crops include field corn and popcorn (46, 38, 50, 51). Nicosulfuron comes in a 75% water dispersible granule formulation. It may be tank mixed with a limited number of other compounds (46, 38, 50, 51).





It may form flammable or explosive dust-air mixtures. It is stable under normal temperatures and pressures. Thermal decomposition products may include toxic oxides of carbon, nitrogen, and sulfur (48). No corrosion or physical change was observed for the end use product after being stored at room temperature for 10 months for either solid granules or container material of construction (high-density polyethylene) (50).

Physical Properties:

Exposure Guidelines:


DuPont Agricultural Products
WalkerÕs Mill, Barley Mill Plaza
P. O. Box 80038
Wilmington, DE 19880-0038


References for the information in this PIP can be found in Reference List Number 9

DISCLAIMER: The information in this profile does not in any way replace or supersede the information on the pesticide product label/ing or other regulatory requirements. Please refer to the pesticide product label/ing.