Classic: chlorimuron-ethyl

Trade Names	Classic
Formulation	DF
Guaranteed active concentration	25%
Groups	2
Ontario Schedule	2
Winter Storage	C
Chemical Family	Sulfonylurea
Crop and/or Non-Crop Registrations	Soybeans
Sensitive Weeds	Common ragweed, redroot pigweed, and velvetleaf
Uptake and Translocation	Following foliar application, chlorimuron 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 growth. Tolerant species rapidly convert chlorimuron to non-phytotoxic metabolites.
Application Methods	Postemergence
Residual Activity	Chlorimuron will provide some limited residual activity after application.
Unique Characteristics	A non-ionic surfactant must be added at 0.2% v/v. 28% Urea ammonium nitrate (U.A.N.) at 2 L/ha will improve the control of velvetleaf. Typical symptoms of plant death (chlorosis, necrosis) may occur from 1-3 weeks after application, depending on growing conditions. Favourable growing conditions will speed the activity while cool or dry conditions will delay activity.
Manufacturer / Registrant	Dupont Canada Inc.