Refine Extra: thifensulfuron-methyl/tribenuron

Trade Names	Refine Extra
Formulation	DF
Guaranteed active concentration	(2:1) 75%
Groups	2
Ontario Schedule	2
Winter Storage	C
Chemical Family	Sulfonyl urea
Crop and/or Non-Crop Registrations	Wheat (spring,winter, durum), barley, oats not underseeded to legumes or grasses. Refine Extra can be applied to winter wheat in the fall or the spring.
Sensitive Weeds	Lamb's-quarters, annual smartweed (green smartweed, lady's-thumb), chickweed, hemp-nettle, wild buckwheat, cow cockle, stinkweed, Canada thistle, sow-thistle, round-leaved mallow.
Uptake and Translocation	Following foliar application, is rapidly absorbed and translocated in both xylem and phloem.
Basis of Selectivity	Inhibition of acetolactate synthase in susceptible plants leads to a rapid cessation of cell division and growth. Tolerant species rapidly convert to non-phytotoxic metabolites.
Application Methods	Postemergence.
Residual Activity	Rapid soil microbial degradation.
Unique Characteristics	A non-ionic surfactant must be added. Typical symptoms of plant death (leaf crinkling, curling, chlorosis) occur 5-10 days after application depending on growing conditions. Tank mixes with MCPA and 2,4-D for control of ragweed and mustards.
Manufacturer / Registrant	Dupont Canada Inc.