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Accent: nicosulfuron

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 21 January 2008

Pub 75: Guide to Weed Control > Notes on Herbicides > Accent: nicosulfuron
Excerpt from Chapter 4, Publication 75, Guide to Weed Control, Order this publication
Trade Names
Accent
Formulation DF
Guaranteed active concentration 75%
Groups  2
Ontario Schedule 2
Winter Storage C
Chemical Family Sulfonylurea
Crop and/or Non-Crop Registrations Field corn, certain varieties only of sweet corn (refer to product label), and seed corn (contact seed source for details on specific inbreds).
Sensitive Weeds Quack grass, proso millet, green and yellow foxtail, fall panicum, barnyard grass, old witch grass. Control of yellow foxtail is only achieved with either the addition of Merge or the addition of 28% UAN at a rate of 5 L/ha along with the recommended non-ionic surfactant.
Uptake and Translocation Following foliar absorption, nicosulfuron is rapidly absorbed through the leaves and translocated in both xylem and phloem.
Basis of Selectivity  Inhibition of acetolactate synthase (ALS) enzyme in susceptible plants leads to a rapid cessation of cell division and regrowth. Tolerant species rapidly convert nicosulfuron to non-phytotoxic metabolites.
Application Methods Postemergent within the 1- to 8-leaf stage of corn.
Residual Activity No soil residual activity.
Unique Characteristics Emerged grasses will be controlled by nicosulfuron but subsequent germinating grasses will not be controlled. A non-ionic surfactant must be added at 0.2% v/v. Typical symptoms of plant death (chlorosis, necrosis) occur 5-10 days after application, depending on growing conditions. Do not apply to corn that has been treated with an organophosphorus soil insecticide.
Manufacturer / Registrant Dupont Canada Inc.

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